#4185: clarify escape behavior of replacement strings.
diff --git a/Lib/re.py b/Lib/re.py
index ee962bb..2cf7132 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -145,7 +145,8 @@
"""Return the string obtained by replacing the leftmost
non-overlapping occurrences of the pattern in string by the
replacement repl. repl can be either a string or a callable;
- if a callable, it's passed the match object and must return
+ if a string, backslash escapes in it are processed. If it is
+ a callable, it's passed the match object and must return
a replacement string to be used."""
return _compile(pattern, 0).sub(repl, string, count)
@@ -155,7 +156,8 @@
non-overlapping occurrences of the pattern in the source
string by the replacement repl. number is the number of
substitutions that were made. repl can be either a string or a
- callable; if a callable, it's passed the match object and must
+ callable; if a string, backslash escapes in it are processed.
+ If it is a callable, it's passed the match object and must
return a replacement string to be used."""
return _compile(pattern, 0).subn(repl, string, count)