make cargo test pass + example

Author: Centri3

clippy_lints/src/single_char_idents.rs

@@ -19,10 +19,17 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```rust,ignore
-    /// for i in collection {
-    ///     let x = i.x;
+    /// for m in movies {
+    ///	    let title = m.t;
     /// }
     /// ```
+    /// Use instead:
+    /// ```rust,ignore
+    /// for movie in movies {
+    ///     let title = movie.title;
+    /// }
+    /// ```
+    /// ```
     #[clippy::version = "1.72.0"]
     pub SINGLE_CHAR_IDENTS,
     restriction,

tests/ui/single_letter_idents.rs renamed to tests/ui/single_char_idents.rs

@@ -1,6 +1,6 @@
 //@aux-build:proc_macros.rs
 #![allow(nonstandard_style, unused)]
-#![warn(clippy::single_letter_idents)]
+#![warn(clippy::single_char_idents)]
 
 extern crate proc_macros;
 use proc_macros::external;

tests/ui/single_char_idents.stderr

@@ -0,0 +1,100 @@
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:9:8
+   |
+LL | struct A {
+   |        ^
+   |
+   = note: `-D clippy::single-char-idents` implied by `-D warnings`
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:10:5
+   |
+LL |     a: u32,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:12:5
+   |
+LL |     A: u32,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:13:5
+   |
+LL |     I: u32,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:16:8
+   |
+LL | struct B(u32);
+   |        ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:20:6
+   |
+LL | enum C {
+   |      ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:21:5
+   |
+LL |     D,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:22:5
+   |
+LL |     E,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:23:5
+   |
+LL |     F,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:31:5
+   |
+LL |     w: u32,
+   |     ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:34:11
+   |
+LL | struct AA<T, E>(T, E);
+   |           ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:34:14
+   |
+LL | struct AA<T, E>(T, E);
+   |              ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:34:17
+   |
+LL | struct AA<T, E>(T, E);
+   |                 ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:34:20
+   |
+LL | struct AA<T, E>(T, E);
+   |                    ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:38:9
+   |
+LL |     let w = 1;
+   |         ^
+
+error: this ident comprises of a single char
+  --> $DIR/single_char_idents.rs:58:4
+   |
+LL | fn b() {}
+   |    ^
+
+error: aborting due to 16 previous errors
+