Issue #18647: A regular expression in the doctest module rewritten so that

determined minimal width of repeated subexpression is >0 (an empty line was
not matched in any case).

diff --git a/Lib/doctest.py b/Lib/doctest.py
index 3e563c6a9cddc32b1042d751a41abd55e78105a3..efa07d7ea51e2dca466fd92dcdb42c48d11edafc 100644 (file)
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -564,7 +564,7 @@ class DocTestParser:
         # Want consists of any non-blank lines that do not start with PS1.
         (?P<want> (?:(?![ ]*$)    # Not a blank line
                      (?![ ]*>>>)  # Not a line starting with PS1
-                     .*$\n?       # But any other line
+                     .+$\n?       # But any other line
                   )*)
         ''', re.MULTILINE | re.VERBOSE)