diff --git a/library/core/src/fmt/float.rs b/library/core/src/fmt/float.rs
index 7ba9f9df15cd7..c70dbf54304de 100644
--- a/library/core/src/fmt/float.rs
+++ b/library/core/src/fmt/float.rs
@@ -196,7 +196,7 @@ where
 }
 
 macro_rules! floating {
-    ($($ty:ident)*) => (
+    ($($ty:ident)*) => {
         $(
             #[stable(feature = "rust1", since = "1.0.0")]
             impl Debug for $ty {
@@ -226,7 +226,7 @@ macro_rules! floating {
                 }
             }
         )*
-    )
+    };
 }
 
 floating! { f32 f64 }
diff --git a/library/core/src/fmt/nofloat.rs b/library/core/src/fmt/nofloat.rs
index e3cee731a8efd..29aaee75d22bc 100644
--- a/library/core/src/fmt/nofloat.rs
+++ b/library/core/src/fmt/nofloat.rs
@@ -1,7 +1,7 @@
 use crate::fmt::{Debug, Formatter, Result};
 
 macro_rules! floating {
-    ($($ty:ident)*) => (
+    ($($ty:ident)*) => {
         $(
             #[stable(feature = "rust1", since = "1.0.0")]
             impl Debug for $ty {
@@ -11,7 +11,7 @@ macro_rules! floating {
                 }
             }
         )*
-    )
+    };
 }
 
 floating! { f16 f32 f64 f128 }
diff --git a/library/core/src/fmt/num.rs b/library/core/src/fmt/num.rs
index 0480a006715fe..f1540803f978d 100644
--- a/library/core/src/fmt/num.rs
+++ b/library/core/src/fmt/num.rs
@@ -20,15 +20,15 @@ trait DisplayInt:
 
 macro_rules! impl_int {
     ($($t:ident)*) => (
-      $(impl DisplayInt for $t {
-          fn zero() -> Self { 0 }
-          fn from_u8(u: u8) -> Self { u as Self }
-          fn to_u8(&self) -> u8 { *self as u8 }
-          #[cfg(not(any(target_pointer_width = "64", target_arch = "wasm32")))]
-          fn to_u32(&self) -> u32 { *self as u32 }
-          fn to_u64(&self) -> u64 { *self as u64 }
-          fn to_u128(&self) -> u128 { *self as u128 }
-      })*
+        $(impl DisplayInt for $t {
+            fn zero() -> Self { 0 }
+            fn from_u8(u: u8) -> Self { u as Self }
+            fn to_u8(&self) -> u8 { *self as u8 }
+            #[cfg(not(any(target_pointer_width = "64", target_arch = "wasm32")))]
+            fn to_u32(&self) -> u32 { *self as u32 }
+            fn to_u64(&self) -> u64 { *self as u64 }
+            fn to_u128(&self) -> u128 { *self as u128 }
+        })*
     )
 }
 
@@ -169,22 +169,23 @@ integer! { i64, u64 }
 integer! { i128, u128 }
 
 macro_rules! impl_Debug {
-    ($($T:ident)*) => (
+    ($($T:ident)*) => {
         $(
-        #[stable(feature = "rust1", since = "1.0.0")]
-        impl fmt::Debug for $T {
-            #[inline]
-            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                if f.debug_lower_hex() {
-                    fmt::LowerHex::fmt(self, f)
-                } else if f.debug_upper_hex() {
-                    fmt::UpperHex::fmt(self, f)
-                } else {
-                    fmt::Display::fmt(self, f)
+            #[stable(feature = "rust1", since = "1.0.0")]
+            impl fmt::Debug for $T {
+                #[inline]
+                fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                    if f.debug_lower_hex() {
+                        fmt::LowerHex::fmt(self, f)
+                    } else if f.debug_upper_hex() {
+                        fmt::UpperHex::fmt(self, f)
+                    } else {
+                        fmt::Display::fmt(self, f)
+                    }
                 }
             }
-        })*
-    )
+        )*
+    };
 }
 
 // 2 digit decimal look up table
@@ -509,8 +510,8 @@ macro_rules! impl_Exp {
 }
 
 impl_Debug! {
-  i8 i16 i32 i64 i128 isize
-  u8 u16 u32 u64 u128 usize
+    i8 i16 i32 i64 i128 isize
+    u8 u16 u32 u64 u128 usize
 }
 
 // Include wasm32 in here since it doesn't reflect the native pointer size, and