Commits on Oct 19, 2018

1. Fixed: Multiple errors on single typo in match pattern …

   Here we have fixed the case where we were throwing two diagnostic
   messages `E0026` and `E0027` for same case like this
   
   Example
   error[E0026]: variant `A::A` does not have a field named `fob`
     --> src/test/ui/issue-52717.rs:20:12
      |
   20 |     A::A { fob } => { println!("{}", fob); }
      |            ^^^ variant `A::A` does not have this field
   
   error[E0027]: pattern does not mention field `foo`
     --> src/test/ui/issue-52717.rs:20:5
      |
   20 |     A::A { fob } => { println!("{}", fob); }
      |     ^^^^^^^^^^^^ missing field `foo`
   
   error: aborting due to 2 previous errors
   
   Here above we can see that both `E0026` and `E0027` are depicting
   same thing.
   
   So, to fix this issue, we are simply checking element of
   `inexistent_fields` is there any value lies in
   `unmentioned_fields` using Levenshtein algorithm, if does
   then for that case we are simply deleting element from
   `unmentioned_fields`. More or less now instead of showing
   separate message in `E0027` we are giving extra hint on `E0026`
   
   Address: rust-lang#52717

   

   PramodBisht committed Oct 19, 2018
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