Consistency of usage of the word LaTeX in the documentation

Fix segfault on invalid bounding FIG when patching dot

Inconsistency in usage of simplesecr versus simplesectsep corrected

The word LaTeX was used as just the word and on other places as \f$\mbox{\LaTeX}\f$
This has been made more consistent by means of the definition of the Alia \LaTeX (similar for \TeX)
Some names of executables etc. were not set in a 'code' font.

Conflicts:
	src/doctokenizer.l

Fix id parsing for atx markdown headers

Merge branch 'feature/bug_678436' of https://github.com/albert-github/doxygen into albert-github-feature/bug_678436

Blank spaces after an if statement have to be removed as well. Also spaces before the firs round bracket have to be removed.

Blank spaces after an if statement have to be removed as well. Just enable them as part of the parameter of the conditional expression and remove them later on (to be safe not having them in the parser).