Doc: Consistently refer to "Web UI" rather than "WebUI"

Change-Id: Ia41e162394fa0f9ab9ae05c16db0c3032fde19cf

Documentation/error-multiple-changeid-lines.txt

diff --git a/Documentation/error-multiple-changeid-lines.txt b/Documentation/error-multiple-changeid-lines.txt
index ca15270..0729547 100644
--- a/Documentation/error-multiple-changeid-lines.txt
+++ b/Documentation/error-multiple-changeid-lines.txt
@@ -7,7 +7,7 @@
 by doing a link:http://www.kernel.org/pub/software/scm/git/docs/git-log.html[git log].
 
 If it was the intention to rework a change and to push a new patch
-set, find the change in the Gerrit WebUI, copy its Change-Id line and
+set, find the change in the Gerrit Web UI, copy its Change-Id line and
 use the copied Change-Id line instead of the existing Change-Id lines
 in the commit message of the commit for which the push is failing.
 How to do this is explained link:error-push-fails-due-to-commit-message.html#commit_hook[here].