/usr/share/source-highlight/langdef.lang is in libsource-highlight-common 3.1.8-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | # this is the language definition for the
# language definition syntax itself
comment start "#"
preproc = "include"
string delim "\"" "\"" escape "\\" multiline
regexp delim "'" "'" escape "\\" multiline
regexp delim "`" "`" escape "\\" multiline
keyword = "state|environment|begin|end|delim|escape|start",
"multiline|nested|vardef|exitall|exit",
"redef|subst|nonsensitive"
symbol = "=|+|,|(|)"
vardef ID = '[[:word:]]+'
variable = '\$' + $ID
variable = $ID
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