Bug fixes:
- Fix error message when underscore selection can't find bundler. Pull
request #4363 by deivid-rodriguez - Fix
Gem::Specification.stubs_forreturning wrong named specs. Pull
request #4356 by tompng - Don't error out when activating a binstub unless necessary. Pull request
#4351 by deivid-rodriguez - Fix
gem outdatedincorrectly handling platform specific gems. Pull
request #4248 by deivid-rodriguez