Remove extra "]" in splitlines() docstring.
Reported by Neal Norwitz.
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 8fab6a9..aea31ac 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -2538,7 +2538,7 @@
static char splitlines__doc__[] =
-"S.splitlines([keepends]]) -> list of strings\n\
+"S.splitlines([keepends]) -> list of strings\n\
\n\
Return a list of the lines in S, breaking at line boundaries.\n\
Line breaks are not included in the resulting list unless keepends\n\