I would use a multiple cursors approach like this:
Windows
- Ctrl + A (Select everything)
- Ctrl + Shift + L (Split into lines)
- End (Put the cursor at the end of the line)
- " (Add the quote at the end of the line)
- Home (Go to the first character of the line)
- Home (Go to the beginning of the line… like if you have tabs or spaces)
- " (Add the quote at the beginning of the line)
Mac
- Cmd + A (Select everything)
- Cmd + Shift + L (Split into lines)
- Cmd + → (Put the cursor at the end of the line)
- " (Add the quote at the end of the line)
- Cmd + ← (Go to the first character of the line)
- Cmd + ← (Go to the beginning of the line… like if you have tabs or spaces)
- " (Add the quote at the beginning of the line)