Use for:else: where it makes sense (html5lib#539)

Co-authored-by: zzj <29055749+zjzh@users.noreply.github.com>
Co-authored-by: Łukasz Langa <lukasz@langa.pl>

Author: idiomaticrefactoring

html5lib/_ihatexml.py

@@ -104,18 +104,15 @@ def charStringToList(chars):
     charRanges = [item.strip() for item in chars.split(" | ")]
     rv = []
     for item in charRanges:
-        foundMatch = False
         for regexp in (reChar, reCharRange):
             match = regexp.match(item)
             if match is not None:
                 rv.append([hexToInt(item) for item in match.groups()])
                 if len(rv[-1]) == 1:
                     rv[-1] = rv[-1] * 2
-                foundMatch = True
                 break
-        if not foundMatch:
+        else:
             assert len(item) == 1
-
             rv.append([ord(item)] * 2)
     rv = normaliseCharList(rv)
     return rv