deparse-skips.t: re/pat_re_eval.t passes
Deparse /@a/ as regexp

This is no good:

$ ./perl -Ilib -MO=Deparse -e '/@a/'
@a;
-e syntax OK

This was probably broken in 5.18 when arrays interpolated into regular
expressions stopped getting a ‘join’ op and started being handled by
the regexp parser directly.
Deparse /@{-}/ with braces

@- and @+ do not interpolate in regular expressions.
deparse-skips.t: Note reasons for re/pat_rt_report.t
deparse-skips.t: Note ticket num for re/pat_advanced.t
deparse-skips.t: re/reg_eval_scope.t passes
deparse-skips.t: Note ticket num for re/reg_fold.t
deparse-skips.t: More passing re tests
deparse-skips.t: Note reason for re/rxcode.t
deparse-skips.t: opbasic tests are passing