bug#32766: Wrong syntax colors with backslash in a string (F90 mode)

[Angelo Graziosi]

> Il 19 settembre 2018 alle 0.51 Angelo Graziosi <angelo.g0@libero.it> ha 
> scritto:
> 
> 
> This code
> 
>   program foo
>     integer, parameter :: FOO = ichar('\')
>     integer, parameter :: BAR = 10
>   end program foo
> 
> produces wrong color syntax from the comma in the second statement. After the 
> first statement the indentation is lost and so the electric-pair-mode etc. 
> Other programming modes could be affected.
> 
> Maybe we must live with this "issue", so I flag this just for the record...

This issue seems more serious than it appears. Many important features of Emacs 
are broken (automatic indentation) and the buffer have to be edited manually, 
more or less in a _Fundamental_ mode..

Notepad++ (Windows) and XED (GNU/Linux Mint) don't have this issue.