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May 27th, 2018
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  1. ^\s*$\n
  2.  
  3. Explanation of the above pattern:
  4.  
  5. -----------------------------------------------
  6. | ^ | beginning of string anchor |
  7. -----------------------------------------------
  8. | \s | any whitespace character |
  9. -----------------------------------------------
  10. | '*'| zero or more repetitions |
  11. -----------------------------------------------
  12. | $ | end of string anchor |
  13. -----------------------------------------------
  14. | \n | new line |
  15. -----------------------------------------------
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