make slice notation in (r)find docs consistent
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 0a6178b..600dac0 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -910,10 +910,10 @@
.. method:: str.find(sub[, start[, end]])
- Return the lowest index in the string where substring *sub* is found, such that
- *sub* is contained in the range [*start*, *end*]. Optional arguments *start*
- and *end* are interpreted as in slice notation. Return ``-1`` if *sub* is not
- found.
+ Return the lowest index in the string where substring *sub* is found, such
+ that *sub* is contained in the slice ``s[start:end]``. Optional arguments
+ *start* and *end* are interpreted as in slice notation. Return ``-1`` if
+ *sub* is not found.
.. method:: str.format(*args, **kwargs)
@@ -1059,9 +1059,9 @@
.. method:: str.rfind(sub [,start [,end]])
- Return the highest index in the string where substring *sub* is found, such that
- *sub* is contained within s[start,end]. Optional arguments *start* and *end*
- are interpreted as in slice notation. Return ``-1`` on failure.
+ Return the highest index in the string where substring *sub* is found, such
+ that *sub* is contained within ``s[start:end]``. Optional arguments *start*
+ and *end* are interpreted as in slice notation. Return ``-1`` on failure.
.. method:: str.rindex(sub[, start[, end]])