1a596630f5
Brackets after an expression in Velocity 1.7 get translated to
calls to a .get(Integer) method, so it is no longer legal to write
$somevar[i] and expect it to translate to somevarvalue[i]. Instead you
must write ${somevar}[i].
The symptom is that
$projectName.replaceAll('/.*/', '...')[$branch.shortName] is left
as is in the subject line of outgoing mail instead of being replaced
by the project and branch name.
Change-Id: I6210ea17dd6f43532ff3b291667015c74555e07b