Fotran lexer: detect keywords formed by two keywords without inter-word spaces. (#1677)
Fotran lexer: detect keywords formed by two keywords without inter-word spaces. (#1677)

* Fix for issue #1188.
* I took the list of keywords affected by this issue from the VIM fortran lexer.
* All the affeced keywords are ending keywords, that is, "end" followed by another keyword without space.
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