clippy 0.0.124

A bunch of helpful lints to avoid common pitfalls in Rust
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error: zero-width space detected
 --> $DIR/unicode.rs:6:12
  |
6 |     print!("Here >​< is a ZWS, and ​another");
  |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: #[deny(zero_width_space)] on by default
  = help: Consider replacing the string with:
          ""Here >/u{200B}< is a ZWS, and /u{200B}another""

error: non-nfc unicode sequence detected
  --> $DIR/unicode.rs:13:12
   |
13 |     print!("̀àh?");
   |            ^^^^^^^
   |
note: lint level defined here
  --> $DIR/unicode.rs:11:8
   |
11 | #[deny(unicode_not_nfc)]
   |        ^^^^^^^^^^^^^^^
   = help: Consider replacing the string with:
           ""̀àh?""

error: literal non-ASCII character detected
  --> $DIR/unicode.rs:19:12
   |
19 |     print!("Üben!");
   |            ^^^^^^^
   |
note: lint level defined here
  --> $DIR/unicode.rs:17:8
   |
17 | #[deny(non_ascii_literal)]
   |        ^^^^^^^^^^^^^^^^^
   = help: Consider replacing the string with:
           ""/u{dc}ben!""

error: aborting due to 3 previous errors