Improve detection of partial templates eligible for collection caching.

The regular expression which was used to detect partial templates that
begin with a `<% cache ... do %>` call missed some cases.  This commits
attempts to improve the detection for some cases such as multi-line
comments at the beginning of the template.  The different templates are
listed in two new unit test methods.

Note that specially crafted Ruby code can still evade such `cache`-call
detection: for example, a user might have its own method which itself
calls the Rails `cache` helper. In such a case, the template's code
doesn't start with a literal `cache` string and therefore will not be
eligible for collection caching.

0 files changed, 0 insertions, 0 deletions