Under Ruby 1.9.3, `bundle pack` is usually failing to resolve the tins dependency between rubocop and term-ansicolor.
Remove the term-ansicolor dependency, which appears to be a development- only dep of pry's coderay dep. coderay's syntax colour support works fine without it at runtime.
Related issues
Bug #12615: Bundler pack could not find compatible versions for gem "tins" on 1.9
fixes #12615 - remove unused term-ansicolor dependency
Under Ruby 1.9.3, `bundle pack` is usually failing to resolve the tins
dependency between rubocop and term-ansicolor.
Remove the term-ansicolor dependency, which appears to be a development-
only dep of pry's coderay dep. coderay's syntax colour support works
fine without it at runtime.