Update codestyle

Update menu element name

Could I specify, what dot is also word delimiter? Because, for example, "p.poly" has a wrong highlighting: "poly" highlighted as function, but it is not a function, it is a part of object "p".

In D18734#411032, @cullmann wrote:

Good question:

I added a minimal howto to the README.md:

https://commits.kde.org/syntax-highlighting/9343341f91274f899f74b1ffe3fa260dadbc0978

Does that help you?

In D18734#410977, @cullmann wrote:

I think this is fine now, but I would like to have some autotests input file to have something we can later check for regressions.
Could you provide some MIT or otherwise freely licensed test file?
It must not cover all things, but at least some basic syntax and perhaps include some of your new things.
Thanks!

Add requested changes

@dhaumann, look on the eps (this word contained in command list) on this image. The word have wrong highlighting.

Should I land it via arc? Or mannualy commit it (for short commit message)?

Increase version

Add Maxima function

In D16806#358163, @apol wrote:

Maybe it would make sense to use the SyntaxHighlighting framework?

Actually, we already use KSyntaxHighlighting, but still only Repository class. We plan rewrite our highlighting code on KSyntaxHighlighting, but we support adding new variables and functions in runtime for different sessions and backends, and as I know KSyntaxHighlighting don't have features for adding new variables and functions, so it is not very easy and we are planning start work on this after 18.12