backticks and testcase

Author: daubaris

clippy_lints/src/ranges.rs

@@ -52,7 +52,7 @@ declare_clippy_lint! {
 /// **Known problems:** Will add unnecessary pair of parentheses when the
 /// expression is not wrapped in a pair but starts with a opening parenthesis
 /// and ends with a closing one.
-/// I.e: let _ = (f()+1)..(f()+1) results in let _ = ((f()+1)..(f()+1)).
+/// I.e: `let _ = (f()+1)..(f()+1)` results in `let _ = ((f()+1)..(f()+1))`.
 ///
 /// **Example:**
 /// ```rust

tests/ui/range_plus_minus_one.rs

@@ -27,6 +27,7 @@ fn main() {
     let _ = ..11-1;
     let _ = ..=11-1;
     let _ = ..=(11-1);
+    let _ = (1..11+1);
     let _ = (f()+1)..(f()+1);
 
     let mut vec: Vec<()> = std::vec::Vec::new();

tests/ui/range_plus_minus_one.stderr

@@ -41,8 +41,14 @@ error: an exclusive range would be more readable
 error: an inclusive range would be more readable
   --> $DIR/range_plus_minus_one.rs:30:13
    |
-28 |     let _ = (f()+1)..(f()+1);
+30 |     let _ = (1..11+1);
+   |             ^^^^^^^^^ help: use: `(1..=11)`
+
+error: an inclusive range would be more readable
+  --> $DIR/range_plus_minus_one.rs:31:13
+   |
+31 |     let _ = (f()+1)..(f()+1);
    |             ^^^^^^^^^^^^^^^^ help: use: `((f()+1)..=f())`
 
-error: aborting due to 7 previous errors
+error: aborting due to 8 previous errors