Signature documentation style update, modules J, K, L and M.
diff --git a/Doc/library/linecache.rst b/Doc/library/linecache.rst
index 1aef2f3..146cb27 100644
--- a/Doc/library/linecache.rst
+++ b/Doc/library/linecache.rst
@@ -1,4 +1,3 @@
-
:mod:`linecache` --- Random access to text lines
================================================
@@ -15,7 +14,7 @@
The :mod:`linecache` module defines the following functions:
-.. function:: getline(filename, lineno[, module_globals])
+.. function:: getline(filename, lineno, module_globals=None)
Get line *lineno* from file named *filename*. This function will never throw an
exception --- it will return ``''`` on errors (the terminating newline character
@@ -35,12 +34,13 @@
previously read using :func:`getline`.
-.. function:: checkcache([filename])
+.. function:: checkcache(filename=None)
Check the cache for validity. Use this function if files in the cache may have
changed on disk, and you require the updated version. If *filename* is omitted,
it will check all the entries in the cache.
+
Example::
>>> import linecache