/usr/share/source-highlight/tml_glue.lang is in libsource-highlight-common 3.1.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | # GluePlugin syntax
preproc = '(^[\*~]~~)'
comment = '(^#~~.*$)'
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