Refactor changes

Author: bishtpawan

src/librustc_error_codes/error_codes/E0710.md

@@ -4,7 +4,6 @@ Erroneous code example:
 
 ```compile_fail,E0710
 #[allow(clipp::filter_map)] // error: an unknown tool name found in scoped lint: `clipp::filter_map`
-
 fn main() {
     /**
     *business logic

src/test/ui/unknown-lint-tool-name.stderr

@@ -37,5 +37,3 @@ LL | #[allow(foo::bar)]
 error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0710`.
-
-