Update prefer-is-not-to-not-is.md

Author: estevao-schultz-neto-SAP

docs/checks/prefer-is-not-to-not-is.md

@@ -1,5 +1,3 @@
-# code pal for ABAP
-
 [code pal for ABAP](../../README.md) > [Documentation](../check_documentation.md) > [Prefer IS NOT to NOT IS](prefer-is-not-to-not-is.md)
 
 ## Prefer IS NOT to NOT IS
@@ -14,7 +12,7 @@ Preferably, use a positive condition; but if the negative condition is easier to
 
 ### What to do in case of exception?
 
-You can suppress Code Inspector findings generated by this check using the pseudo comment `"#EC PREFER_IS_NOT`.
+In exceptional cases, you can suppress this finding by using the pseudo comment `"#EC PREFER_IS_NOT`:
 
 ```abap
   IF NOT variable IS INITIAL. "#EC PREFER_IS_NOT