Rollup merge of #77886 - LingMan:ast_pretty_bool_matches, r=petrochenkov

Replace trivial bool matches with the `matches!` macro

This derives `PartialEq` on one enum (and two structs it contains) to enable the `==` operator for it. If there's some downside to this, I could respin with the `matches!` macro instead.

compiler/rustc_ast_pretty/src/pp.rs

@@ -170,17 +170,11 @@ pub enum Token {
 
 impl Token {
     crate fn is_eof(&self) -> bool {
-        match *self {
+        matches!(self, Token::Eof)
-            Token::Eof => true,
-            _ => false,
-        }
     }
 
     pub fn is_hardbreak_tok(&self) -> bool {
-        match *self {
+        matches!(self, Token::Break(BreakToken { offset: 0, blank_space: SIZE_INFINITY }))
-            Token::Break(BreakToken { offset: 0, blank_space: bs }) if bs == SIZE_INFINITY => true,
-            _ => false,
-        }
     }
 }