document that state variables are not available in the checkconfig hook

diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 45f083b423ca5b88117ce604ba5248431d6b32a3..082f0e38f589d50d2fd14b5f6637d1ddf6b91869 100644 (file)
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -68,20 +68,21 @@ In roughly the order they are called.
 
 This allows for plugins to perform their own processing of command-line
 options and so add options to the ikiwiki command line. It's called during
 
 This allows for plugins to perform their own processing of command-line
 options and so add options to the ikiwiki command line. It's called during

-command line processing, with @ARGV full of any options that ikiwiki was
+command line processing, with `@ARGV` full of any options that ikiwiki was

 not able to process on its own. The function should process any options it
 not able to process on its own. The function should process any options it

-can, removing them from @ARGV, and probably recording the configuration
-settings in %config. It should take care not to abort if it sees
+can, removing them from `@ARGV`, and probably recording the configuration
+settings in `%config`. It should take care not to abort if it sees

 an option it cannot process, and should just skip over those options and
 an option it cannot process, and should just skip over those options and

-leave them in @ARGV.
+leave them in `@ARGV`.

 
 ### checkconfig
 
        hook(type => "checkconfig", id => "foo", call => \&checkconfig);
 
 This is useful if the plugin needs to check for or modify ikiwiki's
 
 ### checkconfig
 
        hook(type => "checkconfig", id => "foo", call => \&checkconfig);
 
 This is useful if the plugin needs to check for or modify ikiwiki's

-configuration. It's called early in the startup process. The
-function is passed no values. It's ok for the function to call
+configuration. It's called early in the startup process. `%config`
+is populated at this point, but other state has not yet been loaded.
+The function is passed no values. It's ok for the function to call

 `error()` if something isn't configured right.
 
 ### refresh
 `error()` if something isn't configured right.
 
 ### refresh