#2456: use Perl strict and warnings in CST

Reporter:	Roland Haas
Status:	open
Milestone:
Version:
Type:	enhancement
Priority:	major
Component:

Comment (by Roland Haas):

Old versions of Perl report warnings about features (that we do not use) being deprecated. See #2466

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2456/use-perl-strict-and-warnings-in-cst