std.demangle: clean imports
fix comment
std.format: clean imports
std.getopt: clean imports
std.json: clean imports
std.path: clean imports
std.zlib: clean imports
Merge pull request #2715 from 9il/zlib

std.zlib: clean imports
Merge pull request #2713 from 9il/path

std.path: clean imports
Merge pull request #2712 from 9il/json

std.json: clean imports
Merge pull request #2711 from 9il/format

std.format: clean imports
Merge pull request #2710 from 9il/getopt

std.getopt: clean imports
Merge pull request #2709 from 9il/demangle

std.demangle: clean imports