0.12.6: Cache value returned by `TicketModule.must_preserve_newlines` property. Refs #11681.
0.12.6: Cache value returned by `TicketModule.must_preserve_newlines` property. Refs #11681.

This avoids a database hit each time the property is accessed for the case that `[ticket] preserve_newlines = default` (the default value).


git-svn-id: 7bda06b145a4a8e9a7f4be07d7c3eb82923a12d6@12985 af82e41b-90c4-0310-8c96-b1721e28e2e2

walty8/trac,jun66j5/trac-ja,jun66j5/trac-ja,walty8/trac,walty8/trac,jun66j5/trac-ja,walty8/trac,jun66j5/trac-ja