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git show $COMMIT
# OR
git diff HEAD^ HEAD
# OR
git diff --cached <file_name>

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git branch -m <old_branch> <new_branch>

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+ Ctrl + V to go into column mode
+ Select the columns and rows where you want to enter your text
+ Shift + i to go into insert mode in column mode
+ Type in the text you want to enter. Dont be discouraged by the fact that only the first row is changed.
+ Esc to apply your change (or alternately Ctrl+C)

http://pivotallabs.com/column-edit-mode-in-vi/

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$ git reset --hard origin/master

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$(document).ready(function() {
  // put all your jQuery goodness in here.
});

// OR

$(function() {
  // put all your jQuery goodness in here.
});

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find . -name "*.ext" -type f -exec grep -i "text" {} +

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# Deploy and run migrations
$ cap <environment> deploy:migrations

# Run migrations
$ cap <environment> deploy:migrate

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$ git remote show origin

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def friendly_filename(filename)
  filename.gsub(/[^\w\s_-]+/, '')
          .gsub(/(^|\b\s)\s+($|\s?\b)/, '\\1\\2')
          .gsub(/\s+/, '_')
end

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git checkout <commit> <path/to/file>