Update reference files

Author: flip1995

tests/ui/crashes/ice-360.stderr

@@ -19,7 +19,7 @@ LL |         loop {}
    |         ^^^^^^^
    |
    = note: `-D clippy::empty-loop` implied by `-D warnings`
-   = help: You should either use `panic!()` or add `std::thread::sleep(..);` to the loop body.
+   = help: you should either use `panic!()` or add `std::thread::sleep(..);` to the loop body
 
 error: aborting due to 2 previous errors
 

tests/ui/empty_loop.stderr

@@ -5,23 +5,23 @@ LL |     loop {}
    |     ^^^^^^^
    |
    = note: `-D clippy::empty-loop` implied by `-D warnings`
-   = help: You should either use `panic!()` or add `std::thread::sleep(..);` to the loop body.
+   = help: you should either use `panic!()` or add `std::thread::sleep(..);` to the loop body
 
 error: empty `loop {}` wastes CPU cycles
   --> $DIR/empty_loop.rs:11:9
    |
 LL |         loop {}
    |         ^^^^^^^
    |
-   = help: You should either use `panic!()` or add `std::thread::sleep(..);` to the loop body.
+   = help: you should either use `panic!()` or add `std::thread::sleep(..);` to the loop body
 
 error: empty `loop {}` wastes CPU cycles
   --> $DIR/empty_loop.rs:15:9
    |
 LL |         'inner: loop {}
    |         ^^^^^^^^^^^^^^^
    |
-   = help: You should either use `panic!()` or add `std::thread::sleep(..);` to the loop body.
+   = help: you should either use `panic!()` or add `std::thread::sleep(..);` to the loop body
 
 error: aborting due to 3 previous errors
 

tests/ui/empty_loop_no_std.stderr

@@ -5,15 +5,15 @@ LL |     loop {}
    |     ^^^^^^^
    |
    = note: `-D clippy::empty-loop` implied by `-D warnings`
-   = help: You should either use `panic!()` or add a call pausing or sleeping the thread to the loop body.
+   = help: you should either use `panic!()` or add a call pausing or sleeping the thread to the loop body
 
 error: empty `loop {}` wastes CPU cycles
   --> $DIR/empty_loop_no_std.rs:26:5
    |
 LL |     loop {}
    |     ^^^^^^^
    |
-   = help: You should either use `panic!()` or add a call pausing or sleeping the thread to the loop body.
+   = help: you should either use `panic!()` or add a call pausing or sleeping the thread to the loop body
 
 error: aborting due to 2 previous errors