On binding not present in all patterns, suggest potential typo

[estebank]

error[E0408]: variable `Ban` is not bound in all patterns
 --> f12.rs:9:9
  |
9 |         (Foo,Bar)|(Ban,Foo) => {}
  |         ^^^^^^^^^  --- variable not in all patterns
  |         |
  |         pattern doesn't bind `Ban`
  |
help: you might have meant to use the similarly named previously used binding `Bar`
  |
9 -         (Foo,Bar)|(Ban,Foo) => {}
9 +         (Foo,Bar)|(Bar,Foo) => {}
  |

Fix #51976.

[rustbot]

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[fee1-dead]

Hmmm. I'm not entirely sure whether this actually fixes the original issue as the original issue is about a variant in scope. I would like to see the original issue in a test.