Fix off-by-one in gzip parsing

[jakobnissen]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.68%. Comparing base (b028a9d) to head (70ecbd0).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master       #7   +/-   ##
=======================================
  Coverage   99.68%   99.68%           
=======================================
  Files           3        3           
  Lines         314      314           
=======================================
  Hits          313      313           
  Misses          1        1           

Flag	Coverage Δ
unittests	99.68% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.