--- filter-bash-environment.py.orig
+++ filter-bash-environment.py
@@ -31,7 +31,7 @@
 			file_out.write(line)
 			continue
 		if pattern.match(line) is None:
-			file_out.write(line)
+			file_out.write(line.replace("\1", ""))
 
 if __name__ == "__main__":
 	description = "Filter out any lines that match a given PATTERN " + \