The current `next` pre-command workaround on IRB source stepping
moves the location by 1 extra line. A better way is to make `debug`
skip IRB frames completely, which is what this commit does.
It also fixes the step command's test. The `|` in regexp was not escaped
so it was always incorrectly matched.
(https://github.com/ruby/irb/pull/464)
* Add debug command tests that don't require yamatanooroti
* Remove debug command related yamatanooroti tests
As discussed in https://github.com/ruby/irb/pull/449#pullrequestreview-1187255149,
we should avoid adding new tests that need yamatanooroti because it's
not maintained by the Ruby org. And since debug commands are now tested
in `test/irb/test_debug_cmd.rb`, we don't need these tests anymore.
* Test against latest debug gem
78a8aa8834
