Suggest macro call when not sure that it is fn definition

src/test/ui/suggestions/pub-ident-fn-2.stderr

@@ -3,7 +3,6 @@ error: missing `fn` for method definition
    |
 11 | pub foo(s: usize) { bar() }
    |    ^
-   |
 help: add `fn` here to parse `foo` as a public method
    |
 11 | pub fn foo(s: usize) { bar() }

src/test/ui/suggestions/pub-ident-fn-or-struct-2.stderr

@@ -2,7 +2,7 @@ error: missing `fn` or `struct` for method or struct definition
   --> $DIR/pub-ident-fn-or-struct-2.rs:11:4
    |
 11 | pub S();
-   |    ^
+   | ---^- help: if you meant to call a macro, write instead: `S!`
 
 error: aborting due to previous error
 

src/test/ui/suggestions/pub-ident-fn-or-struct.stderr

@@ -2,7 +2,7 @@ error: missing `fn` or `struct` for method or struct definition
   --> $DIR/pub-ident-fn-or-struct.rs:11:4
    |
 11 | pub S (foo) bar
-   |    ^
+   | ---^- help: if you meant to call a macro, write instead: `S!`
 
 error: aborting due to previous error
 

src/test/ui/suggestions/pub-ident-fn.stderr

@@ -3,7 +3,6 @@ error: missing `fn` for method definition
    |
 11 | pub   foo(s: usize) -> bool { true }
    |    ^^^
-   |
 help: add `fn` here to parse `foo` as a public method
    |
 11 | pub fn foo(s: usize) -> bool { true }

src/test/ui/suggestions/pub-ident-struct.stderr

@@ -3,7 +3,6 @@ error: missing `struct` for struct definition
    |
 11 | pub S {
    |    ^
-   |
 help: add `struct` here to parse `S` as a public struct
    |
 11 | pub struct S {