Bug 232494 - fix missing space between words. Patch by gerv; r,a=justdave.

webtools/bugzilla/template/en/default/attachment/diff-header.html.tmpl

@@ -299,7 +299,7 @@ tbody.file pre:empty {
   [% END %]
   [% IF warning == "interdiff2" %]
   this difference between two patches may be inaccurate due to a limitation in
-  [% terms.Bugzilla %] when comparing patches made against different revisions.
+  [%+ terms.Bugzilla %] when comparing patches made against different revisions.
   [% END %]
 </h2>
 [% END %]