Inline helper function

Author: robsdedude

Lib/email/_header_value_parser.py

@@ -2837,12 +2837,6 @@ def _steal_trailing_WSP_if_exists(lines):
     return wsp
 
 
-def _last_word_is_sill_ew(_last_word_is_ew, added_str):
-    # If the last word is an encoded word, and the added string is all WSP,
-    # then (and only then) is the last word is still an encoded word.
-    return _last_word_is_ew and not bool(added_str.strip(_WSP))
-
-
 def _refold_parse_tree(parse_tree, *, policy):
     """Return string of contents of parse_tree folded according to RFC rules.
 
@@ -2946,7 +2940,7 @@ def _refold_parse_tree(parse_tree, *, policy):
 
         if len(tstr) <= maxlen - len(lines[-1]):
             lines[-1] += tstr
-            last_word_is_ew = _last_word_is_sill_ew(last_word_is_ew, tstr)
+            last_word_is_ew = last_word_is_ew and not bool(tstr.strip(_WSP))
             continue
 
         # This part is too long to fit.  The RFC wants us to break at
@@ -2957,9 +2951,8 @@ def _refold_parse_tree(parse_tree, *, policy):
             newline = _steal_trailing_WSP_if_exists(lines)
             if newline or part.startswith_fws():
                 lines.append(newline + tstr)
-                last_word_is_ew = _last_word_is_sill_ew(
-                    last_word_is_ew, lines[-1]
-                )
+                last_word_is_ew = (last_word_is_ew
+                                   and not bool(lines[-1].strip(_WSP)))
                 last_ew = None
                 continue
         if not hasattr(part, 'encode'):
@@ -2999,7 +2992,7 @@ def _refold_parse_tree(parse_tree, *, policy):
         else:
             # We can't fold it onto the next line either...
             lines[-1] += tstr
-        last_word_is_ew = _last_word_is_sill_ew(last_word_is_ew, tstr)
+        last_word_is_ew = last_word_is_ew and not bool(tstr.strip(_WSP))
 
     return policy.linesep.join(lines) + policy.linesep