From b35c30251f441f44a5e3ea9c99ced8d75162897f Mon Sep 17 00:00:00 2001
From: Alex Tokarev <aleksator@gmail.com>
Date: Mon, 23 Mar 2020 11:02:46 +0300
Subject: [PATCH] Reword unused variable warning

---
 src/doc/rustc/src/json.md                     |  4 +-
 src/librustc_passes/liveness.rs               |  2 +-
 ...62187-encountered-polymorphic-const.stderr |  2 +-
 src/test/ui/issues/issue-17999.stderr         |  4 +-
 src/test/ui/issues/issue-22599.stderr         |  2 +-
 src/test/ui/issues/issue-56685.stderr         | 12 +++---
 ...0-unused-variable-in-struct-pattern.stderr |  8 ++--
 src/test/ui/lint/lint-match-arms.stderr       |  2 +-
 src/test/ui/lint/lint-removed-allow.stderr    |  2 +-
 src/test/ui/lint/lint-removed-cmdline.stderr  |  2 +-
 src/test/ui/lint/lint-removed.stderr          |  2 +-
 src/test/ui/lint/lint-renamed-allow.stderr    |  2 +-
 src/test/ui/lint/lint-renamed-cmdline.stderr  |  2 +-
 src/test/ui/lint/lint-renamed.stderr          |  2 +-
 src/test/ui/lint/lint-unused-variables.stderr | 22 +++++------
 .../ui/lint/lint-uppercase-variables.stderr   |  6 +--
 src/test/ui/liveness/liveness-unused.stderr   | 16 ++++----
 .../never_type/never-assign-dead-code.stderr  |  2 +-
 .../ui/proc-macro/attributes-included.stderr  |  2 +-
 .../param-attrs-cfg.stderr                    | 38 +++++++++----------
 src/test/ui/span/issue-24690.stderr           |  2 +-
 .../unused-closure-argument.stderr            |  2 +-
 22 files changed, 69 insertions(+), 69 deletions(-)

diff --git a/src/doc/rustc/src/json.md b/src/doc/rustc/src/json.md
index b737849516310..c46380f1505df 100644
--- a/src/doc/rustc/src/json.md
+++ b/src/doc/rustc/src/json.md
@@ -168,7 +168,7 @@ Diagnostics have the following format:
             "rendered": null
         },
         {
-            "message": "consider prefixing with an underscore",
+            "message": "if this is intentional, prefix it with an underscore",
             "code": null,
             "level": "help",
             "spans": [
@@ -201,7 +201,7 @@ Diagnostics have the following format:
     /* Optional string of the rendered version of the diagnostic as displayed
        by rustc. Note that this may be influenced by the `--json` flag.
     */
-    "rendered": "warning: unused variable: `x`\n --> lib.rs:2:9\n  |\n2 |     let x = 123;\n  |         ^ help: consider prefixing with an underscore: `_x`\n  |\n  = note: `#[warn(unused_variables)]` on by default\n\n"
+    "rendered": "warning: unused variable: `x`\n --> lib.rs:2:9\n  |\n2 |     let x = 123;\n  |         ^ help: if this is intentional, prefix it with an underscore: `_x`\n  |\n  = note: `#[warn(unused_variables)]` on by default\n\n"
 }
 ```
 
diff --git a/src/librustc_passes/liveness.rs b/src/librustc_passes/liveness.rs
index bf577d26b0fed..97f6457d39736 100644
--- a/src/librustc_passes/liveness.rs
+++ b/src/librustc_passes/liveness.rs
@@ -1565,7 +1565,7 @@ impl<'tcx> Liveness<'_, 'tcx> {
                             }
                         } else {
                             err.multipart_suggestion(
-                                "consider prefixing with an underscore",
+                                "if this is intentional, prefix it with an underscore",
                                 spans.iter().map(|span| (*span, format!("_{}", name))).collect(),
                                 Applicability::MachineApplicable,
                             );
diff --git a/src/test/ui/const-generics/issues/issue-62187-encountered-polymorphic-const.stderr b/src/test/ui/const-generics/issues/issue-62187-encountered-polymorphic-const.stderr
index 20347ac4b7dac..72f0b333c5a35 100644
--- a/src/test/ui/const-generics/issues/issue-62187-encountered-polymorphic-const.stderr
+++ b/src/test/ui/const-generics/issues/issue-62187-encountered-polymorphic-const.stderr
@@ -10,7 +10,7 @@ warning: unused variable: `foo`
   --> $DIR/issue-62187-encountered-polymorphic-const.rs:15:9
    |
 LL |     let foo = <[u8; 2]>::BIT_LEN;
-   |         ^^^ help: consider prefixing with an underscore: `_foo`
+   |         ^^^ help: if this is intentional, prefix it with an underscore: `_foo`
    |
    = note: `#[warn(unused_variables)]` on by default
 
diff --git a/src/test/ui/issues/issue-17999.stderr b/src/test/ui/issues/issue-17999.stderr
index 448208ef033f7..4a1ef7350b8cb 100644
--- a/src/test/ui/issues/issue-17999.stderr
+++ b/src/test/ui/issues/issue-17999.stderr
@@ -2,7 +2,7 @@ error: unused variable: `x`
   --> $DIR/issue-17999.rs:5:13
    |
 LL |         let x = ();
-   |             ^ help: consider prefixing with an underscore: `_x`
+   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
    |
 note: the lint level is defined here
   --> $DIR/issue-17999.rs:1:9
@@ -14,7 +14,7 @@ error: unused variable: `a`
   --> $DIR/issue-17999.rs:7:13
    |
 LL |             a => {}
-   |             ^ help: consider prefixing with an underscore: `_a`
+   |             ^ help: if this is intentional, prefix it with an underscore: `_a`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/issues/issue-22599.stderr b/src/test/ui/issues/issue-22599.stderr
index 9c3b2cbe6c796..2b34830d08427 100644
--- a/src/test/ui/issues/issue-22599.stderr
+++ b/src/test/ui/issues/issue-22599.stderr
@@ -2,7 +2,7 @@ error: unused variable: `a`
   --> $DIR/issue-22599.rs:8:19
    |
 LL |     v = match 0 { a => 0 };
-   |                   ^ help: consider prefixing with an underscore: `_a`
+   |                   ^ help: if this is intentional, prefix it with an underscore: `_a`
    |
 note: the lint level is defined here
   --> $DIR/issue-22599.rs:1:9
diff --git a/src/test/ui/issues/issue-56685.stderr b/src/test/ui/issues/issue-56685.stderr
index 2cef3126b9ee0..eccb71095acc7 100644
--- a/src/test/ui/issues/issue-56685.stderr
+++ b/src/test/ui/issues/issue-56685.stderr
@@ -9,7 +9,7 @@ note: the lint level is defined here
    |
 LL | #![deny(unused_variables)]
    |         ^^^^^^^^^^^^^^^^
-help: consider prefixing with an underscore
+help: if this is intentional, prefix it with an underscore
    |
 LL |         E::A(_x) | E::B(_x) => {}
    |              ^^         ^^
@@ -20,7 +20,7 @@ error: unused variable: `x`
 LL |         F::A(x, y) | F::B(x, y) => { y },
    |              ^            ^
    |
-help: consider prefixing with an underscore
+help: if this is intentional, prefix it with an underscore
    |
 LL |         F::A(_x, y) | F::B(_x, y) => { y },
    |              ^^            ^^
@@ -29,13 +29,13 @@ error: unused variable: `a`
   --> $DIR/issue-56685.rs:27:14
    |
 LL |         F::C(a, b) => { 3 }
-   |              ^ help: consider prefixing with an underscore: `_a`
+   |              ^ help: if this is intentional, prefix it with an underscore: `_a`
 
 error: unused variable: `b`
   --> $DIR/issue-56685.rs:27:17
    |
 LL |         F::C(a, b) => { 3 }
-   |                 ^ help: consider prefixing with an underscore: `_b`
+   |                 ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `x`
   --> $DIR/issue-56685.rs:32:25
@@ -43,7 +43,7 @@ error: unused variable: `x`
 LL |     let _ = if let F::A(x, y) | F::B(x, y) = F::A(1, 2) {
    |                         ^            ^
    |
-help: consider prefixing with an underscore
+help: if this is intentional, prefix it with an underscore
    |
 LL |     let _ = if let F::A(_x, y) | F::B(_x, y) = F::A(1, 2) {
    |                         ^^            ^^
@@ -54,7 +54,7 @@ error: unused variable: `x`
 LL |     while let F::A(x, y) | F::B(x, y) = F::A(1, 2) {
    |                    ^            ^
    |
-help: consider prefixing with an underscore
+help: if this is intentional, prefix it with an underscore
    |
 LL |     while let F::A(_x, y) | F::B(_x, y) = F::A(1, 2) {
    |                    ^^            ^^
diff --git a/src/test/ui/lint/issue-47390-unused-variable-in-struct-pattern.stderr b/src/test/ui/lint/issue-47390-unused-variable-in-struct-pattern.stderr
index b07474bb48673..cc675a709a2c6 100644
--- a/src/test/ui/lint/issue-47390-unused-variable-in-struct-pattern.stderr
+++ b/src/test/ui/lint/issue-47390-unused-variable-in-struct-pattern.stderr
@@ -2,7 +2,7 @@ warning: unused variable: `i_think_continually`
   --> $DIR/issue-47390-unused-variable-in-struct-pattern.rs:26:9
    |
 LL |     let i_think_continually = 2;
-   |         ^^^^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_i_think_continually`
+   |         ^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_i_think_continually`
    |
 note: the lint level is defined here
   --> $DIR/issue-47390-unused-variable-in-struct-pattern.rs:5:9
@@ -15,19 +15,19 @@ warning: unused variable: `mut_unused_var`
   --> $DIR/issue-47390-unused-variable-in-struct-pattern.rs:33:13
    |
 LL |     let mut mut_unused_var = 1;
-   |             ^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_mut_unused_var`
+   |             ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mut_unused_var`
 
 warning: unused variable: `var`
   --> $DIR/issue-47390-unused-variable-in-struct-pattern.rs:37:14
    |
 LL |     let (mut var, unused_var) = (1, 2);
-   |              ^^^ help: consider prefixing with an underscore: `_var`
+   |              ^^^ help: if this is intentional, prefix it with an underscore: `_var`
 
 warning: unused variable: `unused_var`
   --> $DIR/issue-47390-unused-variable-in-struct-pattern.rs:37:19
    |
 LL |     let (mut var, unused_var) = (1, 2);
-   |                   ^^^^^^^^^^ help: consider prefixing with an underscore: `_unused_var`
+   |                   ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused_var`
 
 warning: unused variable: `corridors_of_light`
   --> $DIR/issue-47390-unused-variable-in-struct-pattern.rs:45:26
diff --git a/src/test/ui/lint/lint-match-arms.stderr b/src/test/ui/lint/lint-match-arms.stderr
index b124971f90512..1bc0e41fd550c 100644
--- a/src/test/ui/lint/lint-match-arms.stderr
+++ b/src/test/ui/lint/lint-match-arms.stderr
@@ -2,7 +2,7 @@ error: unused variable: `y`
   --> $DIR/lint-match-arms.rs:5:9
    |
 LL |         y => (),
-   |         ^ help: consider prefixing with an underscore: `_y`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_y`
    |
 note: the lint level is defined here
   --> $DIR/lint-match-arms.rs:3:16
diff --git a/src/test/ui/lint/lint-removed-allow.stderr b/src/test/ui/lint/lint-removed-allow.stderr
index 5ab95c89b9c7e..029334c2eb67c 100644
--- a/src/test/ui/lint/lint-removed-allow.stderr
+++ b/src/test/ui/lint/lint-removed-allow.stderr
@@ -2,7 +2,7 @@ error: unused variable: `unused`
   --> $DIR/lint-removed-allow.rs:8:17
    |
 LL | fn main() { let unused = (); }
-   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
+   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
    |
 note: the lint level is defined here
   --> $DIR/lint-removed-allow.rs:7:8
diff --git a/src/test/ui/lint/lint-removed-cmdline.stderr b/src/test/ui/lint/lint-removed-cmdline.stderr
index a9ebd3e32712c..4adc18cc2ce5d 100644
--- a/src/test/ui/lint/lint-removed-cmdline.stderr
+++ b/src/test/ui/lint/lint-removed-cmdline.stderr
@@ -18,7 +18,7 @@ error: unused variable: `unused`
   --> $DIR/lint-removed-cmdline.rs:12:17
    |
 LL | fn main() { let unused = (); }
-   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
+   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
    |
 note: the lint level is defined here
   --> $DIR/lint-removed-cmdline.rs:11:8
diff --git a/src/test/ui/lint/lint-removed.stderr b/src/test/ui/lint/lint-removed.stderr
index 2c043392f098c..190e10c8a9944 100644
--- a/src/test/ui/lint/lint-removed.stderr
+++ b/src/test/ui/lint/lint-removed.stderr
@@ -10,7 +10,7 @@ error: unused variable: `unused`
   --> $DIR/lint-removed.rs:8:17
    |
 LL | fn main() { let unused = (); }
-   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
+   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
    |
 note: the lint level is defined here
   --> $DIR/lint-removed.rs:7:8
diff --git a/src/test/ui/lint/lint-renamed-allow.stderr b/src/test/ui/lint/lint-renamed-allow.stderr
index 9da74f61b7569..46f6a10de2743 100644
--- a/src/test/ui/lint/lint-renamed-allow.stderr
+++ b/src/test/ui/lint/lint-renamed-allow.stderr
@@ -2,7 +2,7 @@ error: unused variable: `unused`
   --> $DIR/lint-renamed-allow.rs:8:17
    |
 LL | fn main() { let unused = (); }
-   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
+   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
    |
 note: the lint level is defined here
   --> $DIR/lint-renamed-allow.rs:7:8
diff --git a/src/test/ui/lint/lint-renamed-cmdline.stderr b/src/test/ui/lint/lint-renamed-cmdline.stderr
index 235215598a2bd..ef617dfe31f02 100644
--- a/src/test/ui/lint/lint-renamed-cmdline.stderr
+++ b/src/test/ui/lint/lint-renamed-cmdline.stderr
@@ -18,7 +18,7 @@ error: unused variable: `unused`
   --> $DIR/lint-renamed-cmdline.rs:8:17
    |
 LL | fn main() { let unused = (); }
-   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
+   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
    |
 note: the lint level is defined here
   --> $DIR/lint-renamed-cmdline.rs:7:8
diff --git a/src/test/ui/lint/lint-renamed.stderr b/src/test/ui/lint/lint-renamed.stderr
index dc43f2e4c46da..0225e22623424 100644
--- a/src/test/ui/lint/lint-renamed.stderr
+++ b/src/test/ui/lint/lint-renamed.stderr
@@ -10,7 +10,7 @@ error: unused variable: `unused`
   --> $DIR/lint-renamed.rs:4:17
    |
 LL | fn main() { let unused = (); }
-   |                 ^^^^^^ help: consider prefixing with an underscore: `_unused`
+   |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_unused`
    |
 note: the lint level is defined here
   --> $DIR/lint-renamed.rs:3:8
diff --git a/src/test/ui/lint/lint-unused-variables.stderr b/src/test/ui/lint/lint-unused-variables.stderr
index 57389f8d12010..d6e684e830651 100644
--- a/src/test/ui/lint/lint-unused-variables.stderr
+++ b/src/test/ui/lint/lint-unused-variables.stderr
@@ -2,7 +2,7 @@ error: unused variable: `a`
   --> $DIR/lint-unused-variables.rs:8:5
    |
 LL |     a: i32,
-   |     ^ help: consider prefixing with an underscore: `_a`
+   |     ^ help: if this is intentional, prefix it with an underscore: `_a`
    |
 note: the lint level is defined here
   --> $DIR/lint-unused-variables.rs:5:9
@@ -14,61 +14,61 @@ error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:14:5
    |
 LL |     b: i32,
-   |     ^ help: consider prefixing with an underscore: `_b`
+   |     ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `a`
   --> $DIR/lint-unused-variables.rs:68:9
    |
 LL |         a: i32,
-   |         ^ help: consider prefixing with an underscore: `_a`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:74:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:42:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:47:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `a`
   --> $DIR/lint-unused-variables.rs:22:9
    |
 LL |         a: i32,
-   |         ^ help: consider prefixing with an underscore: `_a`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:29:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:34:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:55:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `b`
   --> $DIR/lint-unused-variables.rs:60:9
    |
 LL |         b: i32,
-   |         ^ help: consider prefixing with an underscore: `_b`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: aborting due to 11 previous errors
 
diff --git a/src/test/ui/lint/lint-uppercase-variables.stderr b/src/test/ui/lint/lint-uppercase-variables.stderr
index 7c2497758d955..1d7e0909e40ab 100644
--- a/src/test/ui/lint/lint-uppercase-variables.stderr
+++ b/src/test/ui/lint/lint-uppercase-variables.stderr
@@ -22,7 +22,7 @@ warning: unused variable: `Foo`
   --> $DIR/lint-uppercase-variables.rs:22:9
    |
 LL |         Foo => {}
-   |         ^^^ help: consider prefixing with an underscore: `_Foo`
+   |         ^^^ help: if this is intentional, prefix it with an underscore: `_Foo`
    |
 note: the lint level is defined here
   --> $DIR/lint-uppercase-variables.rs:1:9
@@ -35,13 +35,13 @@ warning: unused variable: `Foo`
   --> $DIR/lint-uppercase-variables.rs:28:9
    |
 LL |     let Foo = foo::Foo::Foo;
-   |         ^^^ help: consider prefixing with an underscore: `_Foo`
+   |         ^^^ help: if this is intentional, prefix it with an underscore: `_Foo`
 
 warning: unused variable: `Foo`
   --> $DIR/lint-uppercase-variables.rs:33:17
    |
 LL |     fn in_param(Foo: foo::Foo) {}
-   |                 ^^^ help: consider prefixing with an underscore: `_Foo`
+   |                 ^^^ help: if this is intentional, prefix it with an underscore: `_Foo`
 
 error: structure field `X` should have a snake case name
   --> $DIR/lint-uppercase-variables.rs:10:5
diff --git a/src/test/ui/liveness/liveness-unused.stderr b/src/test/ui/liveness/liveness-unused.stderr
index 7adb6a3295b0e..42187330a3eb1 100644
--- a/src/test/ui/liveness/liveness-unused.stderr
+++ b/src/test/ui/liveness/liveness-unused.stderr
@@ -17,7 +17,7 @@ error: unused variable: `x`
   --> $DIR/liveness-unused.rs:8:7
    |
 LL | fn f1(x: isize) {
-   |       ^ help: consider prefixing with an underscore: `_x`
+   |       ^ help: if this is intentional, prefix it with an underscore: `_x`
    |
 note: the lint level is defined here
   --> $DIR/liveness-unused.rs:2:9
@@ -29,19 +29,19 @@ error: unused variable: `x`
   --> $DIR/liveness-unused.rs:12:8
    |
 LL | fn f1b(x: &mut isize) {
-   |        ^ help: consider prefixing with an underscore: `_x`
+   |        ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: unused variable: `x`
   --> $DIR/liveness-unused.rs:20:9
    |
 LL |     let x: isize;
-   |         ^ help: consider prefixing with an underscore: `_x`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: unused variable: `x`
   --> $DIR/liveness-unused.rs:25:9
    |
 LL |     let x = 3;
-   |         ^ help: consider prefixing with an underscore: `_x`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: variable `x` is assigned to, but never used
   --> $DIR/liveness-unused.rs:30:13
@@ -76,25 +76,25 @@ error: unused variable: `i`
   --> $DIR/liveness-unused.rs:59:12
    |
 LL |       Some(i) => {
-   |            ^ help: consider prefixing with an underscore: `_i`
+   |            ^ help: if this is intentional, prefix it with an underscore: `_i`
 
 error: unused variable: `x`
   --> $DIR/liveness-unused.rs:79:9
    |
 LL |     for x in 1..10 { }
-   |         ^ help: consider prefixing with an underscore: `_x`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: unused variable: `x`
   --> $DIR/liveness-unused.rs:84:10
    |
 LL |     for (x, _) in [1, 2, 3].iter().enumerate() { }
-   |          ^ help: consider prefixing with an underscore: `_x`
+   |          ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: unused variable: `x`
   --> $DIR/liveness-unused.rs:89:13
    |
 LL |     for (_, x) in [1, 2, 3].iter().enumerate() {
-   |             ^ help: consider prefixing with an underscore: `_x`
+   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: variable `x` is assigned to, but never used
   --> $DIR/liveness-unused.rs:112:9
diff --git a/src/test/ui/never_type/never-assign-dead-code.stderr b/src/test/ui/never_type/never-assign-dead-code.stderr
index 6002f8e1eb75e..5525802c2511a 100644
--- a/src/test/ui/never_type/never-assign-dead-code.stderr
+++ b/src/test/ui/never_type/never-assign-dead-code.stderr
@@ -25,7 +25,7 @@ warning: unused variable: `x`
   --> $DIR/never-assign-dead-code.rs:9:9
    |
 LL |     let x: ! = panic!("aah");
-   |         ^ help: consider prefixing with an underscore: `_x`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
    |
 note: the lint level is defined here
   --> $DIR/never-assign-dead-code.rs:6:9
diff --git a/src/test/ui/proc-macro/attributes-included.stderr b/src/test/ui/proc-macro/attributes-included.stderr
index 27a215de032aa..bfbcf68b6c7e6 100644
--- a/src/test/ui/proc-macro/attributes-included.stderr
+++ b/src/test/ui/proc-macro/attributes-included.stderr
@@ -2,7 +2,7 @@ warning: unused variable: `a`
   --> $DIR/attributes-included.rs:17:9
    |
 LL |     let a: i32 = "foo";
-   |         ^ help: consider prefixing with an underscore: `_a`
+   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
    |
 note: the lint level is defined here
   --> $DIR/attributes-included.rs:4:9
diff --git a/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr b/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr
index 82099066a89d2..1ced8d8a14a53 100644
--- a/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr
+++ b/src/test/ui/rfc-2565-param-attrs/param-attrs-cfg.stderr
@@ -2,7 +2,7 @@ error: unused variable: `a`
   --> $DIR/param-attrs-cfg.rs:24:23
    |
 LL |     #[cfg(something)] a: i32,
-   |                       ^ help: consider prefixing with an underscore: `_a`
+   |                       ^ help: if this is intentional, prefix it with an underscore: `_a`
    |
 note: the lint level is defined here
   --> $DIR/param-attrs-cfg.rs:5:9
@@ -14,109 +14,109 @@ error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:30:23
    |
 LL |     #[cfg(something)] b: i32,
-   |                       ^ help: consider prefixing with an underscore: `_b`
+   |                       ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:32:40
    |
 LL |     #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                        ^ help: consider prefixing with an underscore: `_c`
+   |                                        ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `a`
   --> $DIR/param-attrs-cfg.rs:107:27
    |
 LL |         #[cfg(something)] a: i32,
-   |                           ^ help: consider prefixing with an underscore: `_a`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_a`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:113:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:115:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:67:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:69:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:75:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:77:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `a`
   --> $DIR/param-attrs-cfg.rs:41:27
    |
 LL |         #[cfg(something)] a: i32,
-   |                           ^ help: consider prefixing with an underscore: `_a`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_a`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:48:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:50:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:56:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:58:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:86:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:88:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: unused variable: `b`
   --> $DIR/param-attrs-cfg.rs:94:27
    |
 LL |         #[cfg(something)] b: i32,
-   |                           ^ help: consider prefixing with an underscore: `_b`
+   |                           ^ help: if this is intentional, prefix it with an underscore: `_b`
 
 error: unused variable: `c`
   --> $DIR/param-attrs-cfg.rs:96:44
    |
 LL |         #[cfg_attr(nothing, cfg(nothing))] c: i32,
-   |                                            ^ help: consider prefixing with an underscore: `_c`
+   |                                            ^ help: if this is intentional, prefix it with an underscore: `_c`
 
 error: aborting due to 19 previous errors
 
diff --git a/src/test/ui/span/issue-24690.stderr b/src/test/ui/span/issue-24690.stderr
index 69d1150abba47..2a090f442cc5f 100644
--- a/src/test/ui/span/issue-24690.stderr
+++ b/src/test/ui/span/issue-24690.stderr
@@ -2,7 +2,7 @@ warning: unused variable: `theOtherTwo`
   --> $DIR/issue-24690.rs:13:9
    |
 LL |     let theOtherTwo = 2;
-   |         ^^^^^^^^^^^ help: consider prefixing with an underscore: `_theOtherTwo`
+   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_theOtherTwo`
    |
 note: the lint level is defined here
   --> $DIR/issue-24690.rs:8:9
diff --git a/src/test/ui/suggestions/unused-closure-argument.stderr b/src/test/ui/suggestions/unused-closure-argument.stderr
index d83ab08e71efc..55195ce50a13e 100644
--- a/src/test/ui/suggestions/unused-closure-argument.stderr
+++ b/src/test/ui/suggestions/unused-closure-argument.stderr
@@ -14,7 +14,7 @@ error: unused variable: `x`
   --> $DIR/unused-closure-argument.rs:17:15
    |
 LL |         .map(|x| 4)
-   |               ^ help: consider prefixing with an underscore: `_x`
+   |               ^ help: if this is intentional, prefix it with an underscore: `_x`
 
 error: aborting due to 2 previous errors