Fix empty-lines regexp to match Windows line endings as well

[uhafner]

Windows line endings are represented by \r\n, which are counted as two two lines in the moment.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.98%. Comparing base (979faa3) to head (72ea8fe).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #991   +/-   ##
=========================================
  Coverage     88.98%   88.98%           
  Complexity      181      181           
=========================================
  Files            11       11           
  Lines           717      717           
  Branches         93       93           
=========================================
  Hits            638      638           
  Misses           62       62           
  Partials         17       17           

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[github-actions]

☀️   Quality Monitor

   🚦   Tests: 98 % successful (✔️ 96 passed, 🙈 2 skipped)
   〰️   Line Coverage: 91% (62 missed lines)
   ➰   Branch Coverage: 92% (19 missed branches)
     Mutation Coverage: 80% (75 survived mutations)
     CheckStyle: No warnings found
     PMD: 1 warning found (0 error, 0 high, 1 normal, 0 low)
     SpotBugs: No warnings found

Created by Quality Monitor v1.7.0 (#823c682). More details are shown in the GitHub Checks Result.

[github-actions]

☀️   Quality Monitor

   🚦   Tests: 98 % successful (✔️ 95 passed, 🙈 2 skipped)
   〰️   Line Coverage: 91% (62 missed lines)
   ➰   Branch Coverage: 92% (19 missed branches)
     Mutation Coverage: 80% (75 survived mutations)
     CheckStyle: No warnings found
     PMD: No warnings found
     SpotBugs: No warnings found

Created by Quality Monitor v1.7.0 (#823c682). More details are shown in the GitHub Checks Result.