Slightly reword the error message

Author: Sasha Pourcelot

compiler/rustc_parse/src/parser/mod.rs

@@ -894,7 +894,7 @@ impl<'a> Parser<'a> {
         let mut first_note = MultiSpan::from(vec![initial_semicolon]);
         first_note.push_span_label(
             initial_semicolon,
-            "this `;` turns the preceding expression into a statement".to_string(),
+            "this `;` turns the preceding closure into a statement".to_string(),
         );
         first_note.push_span_label(
             closure_spans.body,

src/test/ui/expr/malformed_closure/missing_braces_around_block.stderr

@@ -11,7 +11,7 @@ note: statement found outside of a block
   --> $DIR/missing_braces_around_block.rs:16:26
    |
 LL |         println!("{}", a);
-   |         -----------------^ this `;` turns the preceding expression into a statement
+   |         -----------------^ this `;` turns the preceding closure into a statement
    |         |
    |         this expression is a statement because of the trailing semicolon
 note: the closure body may be incorrectly delimited