use bundle open gemname

You can take a peek at a locally installed gem's code very easily in ruby mine.  
If you are using another IDE it would require a few extra steps:  
First, set `BUNDLER_EDITOR` in `~/.bashrc` or `~/.zshrc` (or whatever shell you are using)   
`export BUNDLER_EDITOR="code"`  
(`code` to use VS code)  
Then, simply run `$ bundle open gemname`  and voilá! Look at whatever gem you want 

Eduardo Gutiérrez
April 6, 2021