More clean-ups

Better Cross-platform stuff

https://vimways.org/2018/from-vimrc-to-vim/

autoload/option.vim

@@ -0,0 +1,19 @@
+" From https://sanctum.geek.nz/cgit/dotfiles.git/tree/vim/autoload/option.vim
+
+" 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(copy(parts), 'substitute(v:val, ''\\,'', '','', ''g'')')
+endfunction
+
+" Escape the right-hand side of a :set option value
+"
+function! option#Escape(expr) abort
+  return escape(a:expr, ' |"\')
+endfunction