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" Split a comma-separated option value into parts, accounting for escaped
" commas and leading whitespace as Vim itself does internally
"
function! option#Split(expr, ...) abort
if a:0 > 1
echoerr 'Too many arguments'
endif
let keepempty = a:0 ? a:1 : 0
let parts = split(a:expr, '\\\@<!,[, ]*', keepempty)
return map(parts, 'substitute(v:val, ''\\,'', '','', ''g'')')
endfunction
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