ターミナルでrailsコマンドを打つと毎回謎の文章が出てきます。どうしたら治るのか教えてください！

Question

普通に
rails s
を打つと、

Ignoring ffi-1.9.14 because its extensions are not built.  Try: gem pristine ffi --version 1.9.14
Ignoring nio4r-1.2.1 because its extensions are not built.  Try: gem pristine nio4r --version 1.2.1
Ignoring nokogiri-1.6.8 because its extensions are not built.  Try: gem pristine nokogiri --version 1.6.8
Ignoring puma-3.6.0 because its extensions are not built.  Try: gem pristine puma --version 3.6.0
Ignoring sqlite3-1.3.11 because its extensions are not built.  Try: gem pristine sqlite3 --version 1.3.11
Ignoring therubyracer-0.12.2 because its extensions are not built.  Try: gem pristine therubyracer --version 0.12.2
Ignoring websocket-driver-0.6.4 because its extensions are not built.  Try: gem pristine websocket-driver --version 0.6.4
Ignoring ffi-1.9.14 because its extensions are not built.  Try: gem pristine ffi --version 1.9.14
Ignoring nio4r-1.2.1 because its extensions are not built.  Try: gem pristine nio4r --version 1.2.1
Ignoring nokogiri-1.6.8 because its extensions are not built.  Try: gem pristine nokogiri --version 1.6.8
Ignoring puma-3.6.0 because its extensions are not built.  Try: gem pristine puma --version 3.6.0
Ignoring sqlite3-1.3.11 because its extensions are not built.  Try: gem pristine sqlite3 --version 1.3.11
Ignoring therubyracer-0.12.2 because its extensions are not built.  Try: gem pristine therubyracer --version 0.12.2
Ignoring websocket-driver-0.6.4 because its extensions are not built.  Try: gem pristine websocket-driver --version 0.6.4
=> Booting Puma
=> Rails 5.0.2 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options

とサーバーを立ち上げることはできているのですが、なぜか謎の文章が毎回出てきて困っています。

これをなくすために何をしたら良いのかわからないので、わかるかたどうか教えてください！

Answer 1

ご自身で回答を書いていると思いますが、Try という英語がわからないということでしたら、「試してね」という意味です。