#41 Support hyphenation helpers in TeX mode

[Harald Harders]

LaTeX supports `\-' to declare a position where a word
may be hyphened. aspell should ignore it to test the
whole word as one word (`test\-environment' -->
`testenvironment').

The packages babel.sty as well as (n)german.sty add
some more hyphenation helpers, in particular `"-' and
`""'. Also these should be ignored for looking up words
in the dictionary.

The same applies for the commands that inhibit
ligatures, namely `\/' in standard LaTeX and `"|' with
babel.sty.

[Harald Harders]

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Now, I have found that this feature should be implemented
already (add-tex-hyphen), but it does not seem to work. Does
it work? And if yes, how?

[Kevin Atkinson]

This issue has moved to GitHub: https://github.com/GNUAspell/aspell/issues/304