Deprecate std.c.string and move its contents to druntime
Remained fix for issue 13098 - isValidFilename and alias this
[Refactoring] reduce overloads
Merge pull request #2330 from joakim-noah/strerror_move

Deprecate std.c.string and move its contents to druntime
Merge pull request #2333 from 9rnsr/fix13098

[REG2.066a] Remained fix for issue 13098 - isValidFilename and alias this
some love for std.string

many functions of std.string had no attributes like pure, safe etc.
additionally, many const arguments where not marked as const.
tabs -> whitespace
removed tail whitespace
Doc Examples to unittest docs

more love for std.string

const to in