Automatically switch from RSpec compilation mode to interact with a debugger
Automatically switch from RSpec compilation mode to interact with a debugger

This commit adds the 'inf-ruby-auto-enter method to
'compilation-filter-hook, automatically entering inf-ruby-mode when it
hits a breakpoint (see the
[inf-ruby-manual](https://github.com/nonsequitur/inf-ruby/#manual) for
more details).

The hook is added locally to the rspec-compilation-mode-hook to avoid
global slowdown, as the compilation-filter-hook is called whenever a
new line is entered.

tsonntag/dotemacs,tsonntag/dotemacs,tsonntag/dotemacs,tsonntag/dotemacs