Prefer doc comments over `//`-comments in compiler

3 files changed, 6 insertions, 6 deletions

diff --git a/compiler/rustc_parse/src/lexer/unicode_chars.rs b/compiler/rustc_parse/src/lexer/unicode_chars.rs
index 2c68cc5895c..f1b50296e25 100644
--- a/compiler/rustc_parse/src/lexer/unicode_chars.rs
+++ b/compiler/rustc_parse/src/lexer/unicode_chars.rs
@@ -1,5 +1,5 @@
-// Characters and their corresponding confusables were collected from
-// https://www.unicode.org/Public/security/10.0.0/confusables.txt
+//! Characters and their corresponding confusables were collected from
+//! <https://www.unicode.org/Public/security/10.0.0/confusables.txt>
 
 use super::StringReader;
 use crate::token::{self, Delimiter};
diff --git a/compiler/rustc_parse/src/parser/attr_wrapper.rs b/compiler/rustc_parse/src/parser/attr_wrapper.rs
index c8160548763..a084a701088 100644
--- a/compiler/rustc_parse/src/parser/attr_wrapper.rs
+++ b/compiler/rustc_parse/src/parser/attr_wrapper.rs
@@ -50,7 +50,7 @@ impl AttrWrapper {
         self.attrs
     }
 
-    // Prepend `self.attrs` to `attrs`.
+    /// Prepend `self.attrs` to `attrs`.
     // FIXME: require passing an NT to prevent misuse of this method
     pub(crate) fn prepend_to_nt_inner(self, attrs: &mut AttrVec) {
         let mut self_attrs = self.attrs;
diff --git a/compiler/rustc_parse/src/parser/diagnostics.rs b/compiler/rustc_parse/src/parser/diagnostics.rs
index 3f5baf343c9..c316a4dd6b4 100644
--- a/compiler/rustc_parse/src/parser/diagnostics.rs
+++ b/compiler/rustc_parse/src/parser/diagnostics.rs
@@ -224,9 +224,9 @@ impl MultiSugg {
     }
 }
 
-// SnapshotParser is used to create a snapshot of the parser
-// without causing duplicate errors being emitted when the `Parser`
-// is dropped.
+/// SnapshotParser is used to create a snapshot of the parser
+/// without causing duplicate errors being emitted when the `Parser`
+/// is dropped.
 pub struct SnapshotParser<'a> {
     parser: Parser<'a>,
     unclosed_delims: Vec<UnmatchedBrace>,