Error that coderay-1.1.3 cannot be found.
When there is no description of coderay (1.1.3) in the Gemfile. When there is a description but it is not installed.
The description of coderay (1.1.3) was given by another development member, but in that case, You have to bundle install yourself after pulling from a remote repository (sweat)
It's pretty basic, but I was a little troubled so I recorded it as a learning memo.