Bug #1763149: use proper slice syntax in docstring.
(backport)
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 5d343bd..12fbaed 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -1890,7 +1890,7 @@
"S.find(sub [,start [,end]]) -> int\n\
\n\
Return the lowest index in S where substring sub is found,\n\
-such that sub is contained within s[start,end]. Optional\n\
+such that sub is contained within s[start:end]. Optional\n\
arguments start and end are interpreted as in slice notation.\n\
\n\
Return -1 on failure.");
@@ -1929,7 +1929,7 @@
"S.rfind(sub [,start [,end]]) -> int\n\
\n\
Return the highest index in S where substring sub is found,\n\
-such that sub is contained within s[start,end]. Optional\n\
+such that sub is contained within s[start:end]. Optional\n\
arguments start and end are interpreted as in slice notation.\n\
\n\
Return -1 on failure.");
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 6cc6541..10a8385 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -5757,7 +5757,7 @@
"S.find(sub [,start [,end]]) -> int\n\
\n\
Return the lowest index in S where substring sub is found,\n\
-such that sub is contained within s[start,end]. Optional\n\
+such that sub is contained within s[start:end]. Optional\n\
arguments start and end are interpreted as in slice notation.\n\
\n\
Return -1 on failure.");
@@ -6498,7 +6498,7 @@
"S.rfind(sub [,start [,end]]) -> int\n\
\n\
Return the highest index in S where substring sub is found,\n\
-such that sub is contained within s[start,end]. Optional\n\
+such that sub is contained within s[start:end]. Optional\n\
arguments start and end are interpreted as in slice notation.\n\
\n\
Return -1 on failure.");