gh-91400: make sure email parsing dont unquote realnames with spaces

Author: carlbordum

Lib/email/utils.py

@@ -45,7 +45,7 @@
 CRLF = '\r\n'
 TICK = "'"
 
-specialsre = re.compile(r'[][\\()<>@,:;".]')
+specialsre = re.compile(r'[][\\()<>@,:;". ]')
 escapesre = re.compile(r'[\\"]')
 
 def _has_surrogates(s):

Lib/test/test_email/test_email.py

@@ -3143,7 +3143,7 @@ def test_parseaddr_multiple_domains(self):
     def test_noquote_dump(self):
         self.assertEqual(
             utils.formataddr(('A Silly Person', '[email protected]')),
-            'A Silly Person <[email protected]>')
+            '"A Silly Person" <[email protected]>')
 
     def test_escape_dump(self):
         self.assertEqual(
@@ -3164,6 +3164,14 @@ def test_escape_backslashes(self):
         b = '[email protected]'
         self.assertEqual(utils.parseaddr(utils.formataddr((a, b))), (a, b))
 
+    def test_parseaddr_formataddr_inverse(self):
+        # gh-91400
+        identity = '"foo  bar" <[email protected]>'
+        single = utils.formataddr(utils.parseaddr(identity))
+        double = utils.formataddr(utils.parseaddr(single))
+        self.assertEqual(identity, single)
+        self.assertEqual(single, double)
+
     def test_quotes_unicode_names(self):
         # issue 1690608.  email.utils.formataddr() should be rfc2047 aware.
         name = "H\u00e4ns W\u00fcrst"

Misc/NEWS.d/next/Library/2022-05-10-21-46-28.gh-issue-91400.usUzm_.rst

@@ -0,0 +1 @@
+Make email.utils.formataddr and email.utils.parseaddr inverse of each other