Avoid crashes in 'handle_block_command' * tp/Texinfo/XS/parsetexi/handle_commands.c (handle_block_command): Don't let 'memcmp' try accessing memory past the end of the input buffer.
* tp/Texinfo/XS/parsetexi/end_line.c (parse_line_command_args) <@headings>: Add missing option value 'single'. Report from Sergei Trofimovich <slyich@gmail.com>.
Texinfo fails to build from source when built against glibc 2.34. https://git.savannah.gnu.org/cgit/texinfo.git/commit/?id=c9ade3f83d4fba7a0fbdca87c21f860cffd5f8a4