[3.6] bpo-29549: Fixes docstring for str.index (GH-256) (GH-1028)
(cherry picked from commit 43ba8861e0ad044efafa46a7cc04e12ac5df640e)
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 949205a..7871043 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -11701,7 +11701,11 @@
PyDoc_STRVAR(index__doc__,
"S.index(sub[, start[, end]]) -> int\n\
\n\
-Like S.find() but raise ValueError when the substring is not found.");
+Return the lowest index in S where substring sub is found, \n\
+such that sub is contained within S[start:end]. Optional\n\
+arguments start and end are interpreted as in slice notation.\n\
+\n\
+Raises ValueError when the substring is not found.");
static PyObject *
unicode_index(PyObject *self, PyObject *args)
@@ -12758,7 +12762,11 @@
PyDoc_STRVAR(rindex__doc__,
"S.rindex(sub[, start[, end]]) -> int\n\
\n\
-Like S.rfind() but raise ValueError when the substring is not found.");
+Return the highest index in S where substring sub is found,\n\
+such that sub is contained within S[start:end]. Optional\n\
+arguments start and end are interpreted as in slice notation.\n\
+\n\
+Raises ValueError when the substring is not found.");
static PyObject *
unicode_rindex(PyObject *self, PyObject *args)