#6238: add fillchar to string.just function family.
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 168d1a5..3231d13 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -829,14 +829,15 @@
Return a copy of *s*, but with lower case letters converted to upper case.
-.. function:: ljust(s, width)
- rjust(s, width)
- center(s, width)
+.. function:: ljust(s, width[, fillchar])
+ rjust(s, width[, fillchar])
+ center(s, width[, fillchar])
These functions respectively left-justify, right-justify and center a string in
a field of given width. They return a string that is at least *width*
- characters wide, created by padding the string *s* with spaces until the given
- width on the right, left or both sides. The string is never truncated.
+ characters wide, created by padding the string *s* with the character *fillchar*
+ (default is a space) until the given width on the right, left or both sides.
+ The string is never truncated.
.. function:: zfill(s, width)