Auto merge of #4411 - yuuki1224:patch-2, r=segiddins
Auto merge of #4411 - yuuki1224:patch-2, r=segiddins

Fix typo in cache/platform_spec.rb

just fixed typo!

RochesterinNYC/bundler,bundler/bundler,mvz/bundler,RochesterinNYC/bundler,dilumnavanjana/bundler,asutoshpalai/bundler,mvz/bundler,dilumnavanjana/bundler,asutoshpalai/bundler,bundler/bundler