Extracted specification_directories from ContentsCommand#execute
Extracted path_description from ContentsCommand#execute
Extracted gem_names from ContentsCommand#execute
Extracted gem_contents from ContentsCommand#execute
Add tests for missing gems
Extract spec_for from ContentsCommand#gem_contents
Reorder methods in ContentsCommand
Extract files_in from ContentsCommand#gem_contents
Extract show_files from ContentsCommand
Update history for #186
Return false from ContentsCommand#gem_contest for clarity
Break apart ContentsCommand#files_in