[PATCH] hgrc.5: document ui.traceback

[Brodie Rao]

# HG changeset patch
# User Brodie Rao <me+hg at dackz.net>
# Date 1256582485 14400
# Node ID 027ee8ed914c4f1de0a7cd88dc1373f7fb53d346
# Parent  20b91f91f9cadfc2de79e7a2ecc07302b05ebca1
hgrc.5: document ui.traceback

diff --git a/doc/hgrc.5.txt b/doc/hgrc.5.txt
--- a/doc/hgrc.5.txt
+++ b/doc/hgrc.5.txt
@@ -805,6 +805,10 @@ merge-tools section.
 ``timeout``
     The timeout used when a lock is held (in seconds), a negative value
     means no timeout. Default is 600.
+``traceback``
+    Include tracebacks in error messages. NOTE: Not all error messages will
+    have tracebacks; unhandled errors will print tracebacks regardless.
+    True or False. Default is False.
 ``username``
     The committer of a changeset created when running "commit".
     Typically a person's name and email address, e.g. "Fred Widget