Update docs/source/filters.rst

Co-authored-by: Thomas Perl <[email protected]>

docs/source/filters.rst

@@ -491,7 +491,7 @@ Find, remove or replace text using regular expressions
 
 You can use ``re.sub`` and ``re.findall`` to apply regular expressions.
 
-``re.sub`` can be used to remove of replace all non-overlapping instances
+``re.sub`` can be used to remove or replace all non-overlapping instances
 of matched text. The following example applies the filter 3 times:
 
 1. Just specifying a string as the value will replace the matches with