Fix line break parsing after hard line break

[robinst]

Fixes #415.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.58%. Comparing base (0418c83) to head (fd33435).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #416   +/-   ##
=========================================
  Coverage     94.58%   94.58%           
  Complexity      333      333           
=========================================
  Files           147      147           
  Lines          4836     4838    +2     
  Branches        697      698    +1     
=========================================
+ Hits           4574     4576    +2     
  Misses          141      141           
  Partials        121      121           

Files with missing lines	Coverage Δ
...java/org/commonmark/internal/InlineParserImpl.java	96.20% <100.00%> (+0.01%)	⬆️

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