Fix document.

Author: frozenlib

parse-display/src/display.md

@@ -25,7 +25,7 @@ Helper attributes can be written in the following positions.
 
 ## `#[display("...")]`
 
-Specifies the format using a syntax similar to `std::format!()`.
+Specifies the format using a syntax similar to [`std::format!()`].
 
 However, unlike `std::format!()`, `{}` has the following meaning.
 

parse-display/src/lib.rs

@@ -70,7 +70,7 @@ mod helpers_std;
 ///
 /// ## `#[display("...")]`
 ///
-/// Specifies the format using a syntax similar to `std::format!()`.
+/// Specifies the format using a syntax similar to [`std::format!()`].
 ///
 /// However, unlike `std::format!()`, `{}` has the following meaning.
 ///