[PATCH] ls: Add check_env_quoting() function

[Yurij Goncharuk]

Hello!

I still research code from 'coreutils' and find place where put some 
benefits.
I offer replace block for setting quoting style(watching environment 
variable QUOTING_STYLE) with function as comment 'FIXME: put this in a 
function.' in src/ls.c. I don't sure about function name and required 
prototype, but my vision I introduce in patch. I successfully test this 
block throw tests in tests/ls/*.sh and 'make syntax-check'.


--
with best regards
Yurij Goncharuk

20140821_ls.patch
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