Commits on Oct 22, 2016

1. Reword error when data-less enum variant called as function …

   Given a file like:
   
   ```rust
   enum Test {
       Variant,
       Variant2 {a: u32},
   }
   
   fn main(){
       let x = Test::Variant("Hello");
       let y = Test::Variant2("World");
   }
   ```
   
   The errors now look this way:
   
   ```bash
   error[E0423]: `Test::Variant2` is the name of a struct or struct variant, but this expression uses it like a function name
     --> file3.rs:10:13
      |
   10 |     let y = Test::Variant2("Hello");
      |             ^^^^^^^^^^^^^^ struct called like a function
      |
      = help: did you mean to write: `Test::Variant2 { /* fields */ }`?
   
   error: `Test::Variant` is being called, but it is not a function
    --> file3.rs:9:13
     |
   9 |     let x = Test::Variant("World");
     |             ^^^^^^^^^^^^^^^^^^^^^^
     |
     = help: did you mean to write: `Test::Variant`?
   note: defined here
    --> file3.rs:2:5
     |
   2 |     Variant,
     |     ^^^^^^^
   
   error: aborting due to previous error
   ```

   

   estebank committed Oct 22, 2016
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