This file is indexed.

/usr/share/gedit/plugins/modelines/language-mappings is in gedit-common 3.18.3-0ubuntu4.

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
[vim]
cs=c-sharp
docbk=docbook
javascript=js
lhaskell=haskell-literate
spec=rpmspec
tex=latex
xhtml=html

[emacs]
c++=cpp

[kate]