fix the test case from lintcheck???

Author: ada4a

tests/ui/semicolon_outside_block.fixed

@@ -121,3 +121,16 @@ fn issue14926() {
         },
     }
 }
+
+fn f() {
+    struct Vec;
+    impl Vec {
+        unsafe fn set_len(&mut self, _len: usize) {}
+        fn clear(&mut self) {
+            unsafe {
+                //~^ semicolon_outside_block
+                self.set_len(0)
+            };
+        }
+    }
+}

tests/ui/semicolon_outside_block.rs

@@ -128,6 +128,7 @@ fn f() {
         unsafe fn set_len(&mut self, _len: usize) {}
         fn clear(&mut self) {
             unsafe {
+                //~^ semicolon_outside_block
                 self.set_len(0);
             }
         }

tests/ui/semicolon_outside_block.stderr

@@ -82,5 +82,20 @@ LL ~         line!()
 LL ~     };
    |
 
-error: aborting due to 6 previous errors
+error: consider moving the `;` outside the block for consistent formatting
+  --> tests/ui/semicolon_outside_block.rs:130:13
+   |
+LL | /             unsafe {
+LL | |
+LL | |                 self.set_len(0);
+LL | |             }
+   | |_____________^
+   |
+help: put the `;` here
+   |
+LL ~                 self.set_len(0)
+LL ~             };
+   |
+
+error: aborting due to 7 previous errors