Add documentation for the {tags} keyword.
fixes issue 6
    
        | author | Steve Losh <steve@stevelosh.com> | 
    
        | date | Thu, 10 Sep 2009 18:31:57 -0400 | 
    
    
        | parents | 15afa852bf78 | 
    
        | children | 5339b74840b1 | 
    
        | branches/tags | (none) | 
    
        | files | README prompt.py | 
Changes
    
--- a/README	Thu Sep 10 18:29:09 2009 -0400
+++ b/README	Thu Sep 10 18:31:57 2009 -0400
@@ -68,6 +68,8 @@
 * **root:** the full path to the root of the current repository, without a trailing slash
 * **root|basename:** the directory name of the root of the current repository.  For example, if the repository is in `/home/u/myrepo` then this keyword would expand to `myrepo`.
 * **status:**  `!` if the repository has any changed/added/removed files, otherwise `?` if it has any untracked (but not ignored) files, otherwise nothing.
+* **tags:** the tags of the current parent, separated by a space
+* **tags|SEP:** the tags of the current parent, separated by SEP
 * **task:** the current task (requires the [tasks][] extension)
 * **update:** `^` if the current parent is not the tip of the current branch, otherwise nothing.  In effect, this lets you see if running `hg update` would do something.
 
--- a/prompt.py	Thu Sep 10 18:29:09 2009 -0400
+++ b/prompt.py	Thu Sep 10 18:31:57 2009 -0400
@@ -84,6 +84,8 @@
     - status: "!" if the current repository contains files that have been
         modified, added, removed, or deleted, otherwise "?" if it contains
         untracked (and not ignored) files, otherwise nothing.
+    - tags: the tags of the current parent, separated by a space
+    - tags|SEP: the tags of the current parent, separated by SEP
     - task: the current task (requires the tasks extension)
     - update: "^" if the current parent is not the tip of the current branch,
         otherwise nothing.  In effect, this lets you see if running