error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:7:13
   |
LL |     x.split("x");
   |             ^^^ help: consider using a `char`: `'x'`
   |
   = note: `-D clippy::single-char-pattern` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::single_char_pattern)]`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:13:13
   |
LL |     x.split("ß");
   |             ^^^ help: consider using a `char`: `'ß'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:14:13
   |
LL |     x.split("ℝ");
   |             ^^^ help: consider using a `char`: `'ℝ'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:15:13
   |
LL |     x.split("💣");
   |             ^^^^ help: consider using a `char`: `'💣'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:18:23
   |
LL |     x.split_inclusive("x");
   |                       ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:19:16
   |
LL |     x.contains("x");
   |                ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:20:19
   |
LL |     x.starts_with("x");
   |                   ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:21:17
   |
LL |     x.ends_with("x");
   |                 ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:22:12
   |
LL |     x.find("x");
   |            ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:23:13
   |
LL |     x.rfind("x");
   |             ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:24:14
   |
LL |     x.rsplit("x");
   |              ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:25:24
   |
LL |     x.split_terminator("x");
   |                        ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:26:25
   |
LL |     x.rsplit_terminator("x");
   |                         ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:27:17
   |
LL |     x.splitn(2, "x");
   |                 ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:28:18
   |
LL |     x.rsplitn(2, "x");
   |                  ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:29:18
   |
LL |     x.split_once("x");
   |                  ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:30:19
   |
LL |     x.rsplit_once("x");
   |                   ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:31:15
   |
LL |     x.matches("x");
   |               ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:32:16
   |
LL |     x.rmatches("x");
   |                ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:33:21
   |
LL |     x.match_indices("x");
   |                     ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:34:22
   |
LL |     x.rmatch_indices("x");
   |                      ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:35:26
   |
LL |     x.trim_start_matches("x");
   |                          ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:36:24
   |
LL |     x.trim_end_matches("x");
   |                        ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:37:20
   |
LL |     x.strip_prefix("x");
   |                    ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:38:20
   |
LL |     x.strip_suffix("x");
   |                    ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:39:15
   |
LL |     x.replace("x", "y");
   |               ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:40:16
   |
LL |     x.replacen("x", "y", 3);
   |                ^^^ help: consider using a `char`: `'x'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:42:13
   |
LL |     x.split("\n");
   |             ^^^^ help: consider using a `char`: `'\n'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:43:13
   |
LL |     x.split("'");
   |             ^^^ help: consider using a `char`: `'\''`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:44:13
   |
LL |     x.split("\'");
   |             ^^^^ help: consider using a `char`: `'\''`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:46:13
   |
LL |     x.split("\"");
   |             ^^^^ help: consider using a `char`: `'"'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:51:31
   |
LL |     x.replace(';', ",").split(","); // issue #2978
   |                               ^^^ help: consider using a `char`: `','`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:52:19
   |
LL |     x.starts_with("\x03"); // issue #2996
   |                   ^^^^^^ help: consider using a `char`: `'\x03'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:59:13
   |
LL |     x.split(r"a");
   |             ^^^^ help: consider using a `char`: `'a'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:60:13
   |
LL |     x.split(r#"a"#);
   |             ^^^^^^ help: consider using a `char`: `'a'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:61:13
   |
LL |     x.split(r###"a"###);
   |             ^^^^^^^^^^ help: consider using a `char`: `'a'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:62:13
   |
LL |     x.split(r###"'"###);
   |             ^^^^^^^^^^ help: consider using a `char`: `'\''`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:63:13
   |
LL |     x.split(r###"#"###);
   |             ^^^^^^^^^^ help: consider using a `char`: `'#'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:65:13
   |
LL |     x.split(r#"\"#);
   |             ^^^^^^ help: consider using a `char`: `'\\'`

error: single-character string constant used as pattern
  --> tests/ui/single_char_pattern.rs:66:13
   |
LL |     x.split(r"\");
   |             ^^^^ help: consider using a `char`: `'\\'`

error: aborting due to 40 previous errors