I've been using the same-ish vim config for ~8 years now. It follows the "convention over configuration" and is perfect for Ruby, Rails, and testing.
• One line install script
• Asynchronous linting = fast
• Fuzzy finder
• Defaulted key bindings
• Much more...
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An example showing off some of my favorite plugins:
• NERDTree on the left
• fzf search on the bottom pane
• Highlighted standardrb fix with description at bottom
• git gutter on line 19 showing a change
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Some of my favorite shortcuts:
• :Emigration - open the newest Rails migration
• :AV - open the test to the current file in a vertical split
• :AS - same but in a horizontal split
• :Glame - show the `git blame` in the gutter
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The only commit I maintain on my "fork" is my color scheme, base-16 light and base-16 dark (to match my computer's appearance). I fetch upstream often.