chore: fix some comments

Signed-off-by: VitalikButerinEth <csyingyu@126.com>

tests/ui/double_neg.rs

@@ -5,6 +5,6 @@ fn main() {
     -x;
     -(-x);
     --x;
-    //~^ ERROR: `--x` could be misinterpreted as pre-decrement by C programmers, is usuall
+    //~^ ERROR: `--x` could be misinterpreted as pre-decrement by C programmers, is usually
     //~| NOTE: `-D clippy::double-neg` implied by `-D warnings`
 }

tests/ui/infinite_loops.rs

@@ -137,7 +137,7 @@ fn can_break_both_inner_and_outer(cond: bool) {
 }
 
 fn break_wrong_loop(cond: bool) {
-    // 'inner has statement to break 'outer loop, but it was breaked early by a labeled child loop
+    // 'inner has statement to break 'outer loop, but it was broken out of early by a labeled child loop
     'outer: loop {
         loop {
             //~^ ERROR: infinite loop detected

tests/ui/iter_over_hash_type.rs

@@ -59,7 +59,7 @@ fn main() {
         let _ = x;
     }
 
-    // shouldnt fire
+    // shouldn't fire
     for x in &vec {
         let _ = x;
     }