18877: add note about supporting latest versions, tag names being plural etc

ChangeLog

@@ -1,3 +1,7 @@
+2003-07-23  Oliver Kiddle  <opk@zsh.org>
+
+	* 18877: Etc/completion-style-guide: add a few more points
+
 2003-07-23  Peter Stephenson  <pws@csr.com>
 
 	* 18888: Philippe Troin: Src/Modules/clone.c: Allow clone to

Etc/completion-style-guide

@@ -17,7 +17,8 @@ Coding style:
   isn't room for it (see the next point) in which case put it on the
   next line un-indented.
 
-* Please try not to use lines longer than 79 characters.
+* Please try not to use lines longer than 79 characters. Don't worry
+  about breaking long `_arguments' or `_values' specs though.
 
 Descriptions:
 
@@ -49,6 +50,11 @@ for example, do not use:
 but use:
   '--timeout[specify connection timeout]:timeout (ms)'
   
+Group descriptions should be singular because only one thing is being
+completed even though many may be listed. This applies even where you
+complete a list of the things. Tags, functions for completing types of
+things (such as _files), and states should have plural names.
+
 In a function, allow any descriptions passed as an argument to override
 the default you define. For example:
   _wanted directories expl directory _files -/ "$@" -
@@ -65,6 +71,14 @@ matches which are completely opposite in their meaning if it shortens
 the completion listing provided that the names of the matches makes it
 clear what their effect is.
 
+Command Versions:
+
+In most cases multiple versions (releases) of commands are not
+supported. The functions are merely updated to reflect the latest stable
+version. Exceptions to this can be made where are particular version
+continues to be commonly distributed. Where there is more than one variant
+of the same command however, the separate variants should be supported.
+
 Contexts, tags and all that
 ---------------------------