Jump to cucumber step definitions in VIM
There is an amazing vim plugin vim-cucumber that allows you to jump from step (.feature file) to its definition (_steps.rb file).
In vim normal mode put the cursor on any step inside a .feature file and:
- 
[dor]d=> split pane - 
<CTRL-w><CTRL-d>=> split pane and change cursor focus - 
[<CTRL-d>or]<CTRL-d>=> replace pane 
h/t @mrmicahcooper
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