error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:16:13
   |
LL |     x.split("x");
   |             ^^^ help: try using a char instead: `'x'`
   |
   = note: `-D clippy::single-char-pattern` implied by `-D warnings`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:33:16
   |
LL |     x.contains("x");
   |                ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:34:19
   |
LL |     x.starts_with("x");
   |                   ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:35:17
   |
LL |     x.ends_with("x");
   |                 ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:36:12
   |
LL |     x.find("x");
   |            ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:37:13
   |
LL |     x.rfind("x");
   |             ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:38:14
   |
LL |     x.rsplit("x");
   |              ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:39:24
   |
LL |     x.split_terminator("x");
   |                        ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:40:25
   |
LL |     x.rsplit_terminator("x");
   |                         ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:41:17
   |
LL |     x.splitn(0, "x");
   |                 ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:42:18
   |
LL |     x.rsplitn(0, "x");
   |                  ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:43:15
   |
LL |     x.matches("x");
   |               ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:44:16
   |
LL |     x.rmatches("x");
   |                ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:45:21
   |
LL |     x.match_indices("x");
   |                     ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:46:22
   |
LL |     x.rmatch_indices("x");
   |                      ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:47:26
   |
LL |     x.trim_start_matches("x");
   |                          ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:48:24
   |
LL |     x.trim_end_matches("x");
   |                        ^^^ help: try using a char instead: `'x'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:50:13
   |
LL |     x.split("/n");
   |             ^^^^ help: try using a char instead: `'/n'`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:55:31
   |
LL |     x.replace(";", ",").split(","); // issue #2978
   |                               ^^^ help: try using a char instead: `','`

error: single-character string constant used as pattern
  --> $DIR/single_char_pattern.rs:56:19
   |
LL |     x.starts_with("/x03"); // issue #2996
   |                   ^^^^^^ help: try using a char instead: `'/x03'`

error: aborting due to 20 previous errors