Separate consecutive ranges with a space

[dtolnay]

Previously the expression ..(..) would print as ...., which the parser cannot handle.

error: unexpected token: `...`
 --> src/main.rs:2:13
  |
2 |     let _ = ....;
  |             ^^^
  |
help: use `..` for an exclusive range
  |
2 |     let _ = ...;
  |             ~~
help: or `..=` for an inclusive range
  |
2 |     let _ = ..=.;
  |             ~~~

error[E0586]: inclusive range with no end
 --> src/main.rs:2:13
  |
2 |     let _ = ....;
  |             ^^^
  |
  = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
help: use `..` instead
  |
2 -     let _ = ....;
2 +     let _ = ...;
  |

error: expected one of `;` or `else`, found `.`
 --> src/main.rs:2:16
  |
2 |     let _ = ....;
  |                ^ expected one of `;` or `else`