Rollup merge of #105521 - tshepang:keep-heading-separate, r=nagisa

separate heading from body

compiler/rustc_span/src/symbol.rs

@@ -1710,7 +1710,8 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     }
 }
 
-/// This is the most general way to print identifiers.
+/// The most general type to print identifiers.
+///
 /// AST pretty-printer is used as a fallback for turning AST structures into token streams for
 /// proc macros. Additionally, proc macros may stringify their input and expect it survive the
 /// stringification (especially true for proc macro derives written between Rust 1.15 and 1.30).