Texinfo: new parser

[masatake]

• test cases

[codecov]

Codecov Report

Attention: 35 lines in your changes are missing coverage. Please review.

Comparison is base (dbeed62) 82.98% compared to head (6225ff2) 82.83%.
Report is 390 commits behind head on master.

❗ Current head 6225ff2 differs from pull request most recent head da4af9c. Consider uploading reports for the commit da4af9c to get more accurate results

Files	Patch %	Lines
main/lregex.c	0.00%	33 Missing ⚠️
main/entry.c	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3612      +/-   ##
==========================================
- Coverage   82.98%   82.83%   -0.16%     
==========================================
  Files         226      224       -2     
  Lines       55003    54492     -511     
==========================================
- Hits        45645    45136     -509     
+ Misses       9358     9356       -2     

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