[Benoît Legat]

When several \end and/or \begin of environments lies on the same line, the indentation is not always relevant.
This patch tries to fix it with a little bit of refactoring too (the code for \begin and \end is refactored to one function).
I did some tests and it should normally work now for even the most extreme cases.

Patch for the improvement

I've also tried to improve the indentation of multiple \begin and \end on one line. See https://github.com/gerw/vim-latex-suite/blob/master/indent/tex.vim

Looks OK to me. I'll commit it after a couple of minor changes.

1. Correct spelling of "Exemples" to "Examples" (do a search and replace in the comments).

2. Correct spelling of "occurence" to "occurrence" (again, in the comments).

3. Correct spelling of "substraction" to "subtraction" (comments).

4. (not that big of a deal; just for consideration) Change "parameters" to "arguments" throughout comments.

5. (not that important, but just to consider) I don't really like using "->" to mean "returns" as it already has a loaded meaning in CS as "gets." Really, "HasEnv" is a predicate that is either asserted or not. So I'd almost like to see something like...

"For example, both of the following are asserted (or you could say "true", I suppose):

HasEnv( ..., ... )
! HasEnv( ..., ...)"

You could do something similar with BeginEnd using double equals in the comments. Like:

"For example, all of the following are asserted (or, again, true, I suppose):

BeginEnd( ..., ..., ...) == 1
BeginEnd( ..., ..., ...) == 1
BeginEnd( ..., ..., ...) == 2
BeginEnd( ..., ..., ...) == 0"

Make at least changes 1 through 3, and I'll commit your patch and push it.