The ruby_cmd helper blindly escapes code blocks passed to it,
causing "sleep" to be quoted in the command-line. This quoting
results in IO.popen using a subshell (/bin/sh) to run the given
string command instead of invoking the Ruby executable directly.
Thus, IO.popen would only see the PID of the subshell via
IO#pid, and merely sending SIGKILL to the subshell would not
result in the child ("ruby -e sleep") being killed.
This problem with lingering ruby processes was easier to
reproduce on slow or heavily-loaded systems using low-scheduling
priority (e.g. "chrt -i 0 make test-rubyspec")
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58863 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
These files can therefore be updated like any other file in MRI.
Instructions are provided in spec/README.
[Feature #13156] [ruby-core:79246]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
