[Github-comments] [geany/geany] Add missing string and comment styles for various lexers (#1502)

[elextr]

> I have no clue what SCE_C_USERLITERAL is.

Its a C++ thing :) 

A class can define a suffix to go after a literal to make it define an instance of the class instead of the type the literal usually makes. For example the `std::string` literal `"...."s` is actually just a user defined literal, not a built-in literal like the `"..."` char array literal is. For gory details see [here](http://en.cppreference.com/w/cpp/language/user_literal).  

Unfortunately as that link above shows, it also applies to char and numeric literals, and Scintilla doesn't distinguish between them, dammit.  But given that `std::string` literals are far more common than numeric literals  (in my experience) I would still add it to strings until someone complains, then prod Neil with a patch to separate string user literals from the others.

> Whatever QR and QW might mean.

Dunno, but there are other languages with them already added IIRC.

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