[Tracker] Tracker doesn't index contents of text/x-tex files

[Mark Florian <markrian gmail com>]

I just noticed that tracker doesn't index the contents of files of the
type text/x-tex, that is TeX/LaTeX files. If I copy such a file, called
say thesis.tex to thesis.txt, then tracker indexes that .txt file fully
as would be expected.

I haven't checked how tracker treats other variants of text/* mimetypes,
but it strikes me that tracker should index the contents of *all* text
files.

FYI, I'm running unmodified Tracker 0.5.2 on Ubuntu 6.10.

Mark