#2834: Change re module semantics, so that str and bytes mixing is forbidden,
and str (unicode) patterns get full unicode matching by default. The re.ASCII
flag is also introduced to ask for ASCII matching instead.
diff --git a/Lib/decimal.py b/Lib/decimal.py
index 2c02f11..88cc5cd 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -5415,7 +5415,7 @@
# 2. For finite numbers (not infinities and NaNs) the body of the
# number between the optional sign and the optional exponent must have
# at least one decimal digit, possibly after the decimal point. The
-# lookahead expression '(?=\d|\.\d)' checks this.
+# lookahead expression '(?=[0-9]|\.[0-9])' checks this.
#
# As the flag UNICODE is not enabled here, we're explicitly avoiding any
# other meaning for \d than the numbers [0-9].