Correctly handle string prefix in lxml tree creation

[quantum5]

No description provided.

[codecov-commenter]

Codecov Report

Merging #1463 into master will increase coverage by 0.29%.
The diff coverage is 89.74%.

@@            Coverage Diff             @@
##           master    #1463      +/-   ##
==========================================
+ Coverage   45.56%   45.85%   +0.29%     
==========================================
  Files         208      208              
  Lines       11935    11966      +31     
==========================================
+ Hits         5438     5487      +49     
+ Misses       6497     6479      -18     

Impacted Files	Coverage Δ
judge/jinja2/markdown/__init__.py	67.44% <76.47%> (+7.77%)	⬆️
judge/jinja2/markdown/test_markdown.py	100.00% <100.00%> (ø)
judge/jinja2/markdown/lazy_load.py	94.11% <0.00%> (+70.58%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e21d8ad...a07d420. Read the comment docs.