inf-ruby.el: fix compilation-shell-minor-mode
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38107 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
inf-ruby.el: fix compilation-shell-minor-mode
compilation-shell-minor-mode configuration. a patch by
j2petkov (Jean-Christophe Petkovich) in [ruby-core:46518].
[Bug #6742]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38107 b2dd03c8-39d4-4d8f-98ff-823fe69b080e