--- a/mercurial/help/environment.txt Sat Feb 13 23:24:27 2010 -0600
+++ b/mercurial/help/environment.txt Sun Feb 07 14:56:18 2010 +0100
@@ -42,6 +42,16 @@
- if it's a directory, all files ending with .rc are added
- otherwise, the file itself will be added
+HGPLAIN
+ When set, this disables any options in .hgrc that might change
+ Mercurial's default output. This includes encoding, defaults,
+ verbose mode, debug mode, quiet mode, tracebacks, and
+ localization. This can be useful when scripting against Mercurial
+ in the face of existing user configuration.
+
+ Equivalent options set via command line flags or environment
+ variables are not overridden.
+
HGUSER
This is the string used as the author of a commit. If not set,
available values will be considered in this order: