review comment: suggestion message wording

Author: estebank

src/librustc_resolve/late/diagnostics.rs

@@ -202,7 +202,8 @@ impl<'a> LateResolutionVisitor<'a, '_, '_> {
                     };
                     err.span_suggestion_verbose(
                         span,
-                        "you are also missing a `self` receiver argument",
+                        "if you meant to use `self`, you are also missing a `self` receiver \
+                         argument",
                         sugg.to_string(),
                         Applicability::MaybeIncorrect,
                     );

src/test/ui/issues/issue-5099.stderr

@@ -8,7 +8,7 @@ help: you might have meant to use `self` here instead
    |
 LL |         self.a
    |         ^^^^
-help: you are also missing a `self` receiver argument
+help: if you meant to use `self`, you are also missing a `self` receiver argument
    |
 LL |     fn a(&self) -> A {
    |          ^^^^^
@@ -23,7 +23,7 @@ help: you might have meant to use `self` here instead
    |
 LL |         self.b(x);
    |         ^^^^
-help: you are also missing a `self` receiver argument
+help: if you meant to use `self`, you are also missing a `self` receiver argument
    |
 LL |     fn b(&self, x: i32) {
    |          ^^^^^^