Update runtime files.
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 918e1b7..193e323 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt* For Vim version 7.4. Last change: 2014 Dec 17
+*options.txt* For Vim version 7.4. Last change: 2015 Jan 27
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -1316,6 +1316,8 @@
nofile only: The buffer name is fixed, it is not handled like a
file name. It is not modified in response to a |:cd|
command.
+ nofile only: When using ":e bufname" and already editing "bufname"
+ nothing changes, since there is no file to edit.
*E676*
"acwrite" implies that the buffer name is not related to a file, like
"nofile", but it will be written. Thus, in contrast to "nofile" and