Fill in suggestions Applicability according to @estebank

Also fix some formatting along the way.

src/libsyntax/parse/parser.rs

@@ -3882,11 +3882,12 @@ impl<'a> Parser<'a> {
                 if self.token == token::CloseDelim(token::Brace) {
                     // If the struct looks otherwise well formed, recover and continue.
                     if let Some(sp) = comma_sp {
-                        err.span_suggestion_short_with_applicability(sp,
-                                                                     "remove this comma",
-                                                                     String::new(),
-                                                                     Applicability::Unspecified,
-                                                                     );
+                        err.span_suggestion_short_with_applicability(
+                                                                 sp,
+                                                                 "remove this comma",
+                                                                 String::new(),
+                                                                 Applicability::MachineApplicable,
+                                                                 );
                     }
                     err.emit();
                     break;