Undo code changed by mistake.

Author: maxking

Lib/email/_header_value_parser.py

@@ -1366,12 +1366,12 @@ def get_word(value):
     if value[0]=='"':
         token, value = get_quoted_string(value)
     elif value[0] in SPECIALS:
-        raise errors.HeaderParseError((value))
+        raise errors.HeaderParseError("Expected 'atom' or 'quoted-string' "
+                                      "but found '{}'".format(value))
     else:
         token, value = get_atom(value)
     if leader is not None:
         token[:0] = [leader]
-
     return token, value
 
 def get_phrase(value):

Misc/NEWS.d/next/Library/2019-06-25-19-27-25.bpo-29412.n4Zqdh.rst

@@ -1,2 +1,2 @@
-Fix IndexError in parsing a header value with only comments in some headers.
-Patch by Abhilash Raj.
+Fix IndexError in parsing a header value ending unexpectedly. Patch by Abhilash
+Raj.