Update Diff output to account for applicability of fixes

crates/ruff/src/message/diff.rs

@@ -1,6 +1,6 @@
 use crate::message::Message;
 use colored::{Color, ColoredString, Colorize, Styles};
-use ruff_diagnostics::Fix;
+use ruff_diagnostics::{Fix, Applicability};
 use ruff_python_ast::source_code::{OneIndexed, SourceFile};
 use ruff_text_size::{TextRange, TextSize};
 use similar::{ChangeTag, TextDiff};
@@ -47,8 +47,14 @@ impl Display for Diff<'_> {
 
         let diff = TextDiff::from_lines(self.source_code.source_text(), &output);
 
-        writeln!(f, "{}", "ℹ Suggested fix".blue())?;
-
+        let message = match self.fix.applicability() {
+            Applicability::Automatic => "Fix",
+            Applicability::Suggested => "Suggested fix",
+            Applicability::Manual => "Possible fix",
+            _ => "Suggested fix",  // For backwards compatibility, unspecified fixes are 'suggested'
+        };
+        writeln!(f, "ℹ {}", message.blue())?;
+
         let (largest_old, largest_new) = diff
             .ops()
             .last()