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" Default to POSIX shell, as I never write Bourne, and if I write Bash or Ksh
" it'll be denoted with either a shebang or an appropriate extension.
let g:is_posix = 1

"
" Setting g:is_posix above also prompts Vim's core syntax/sh.vim script to
" set g:is_kornshell and thereby b:is_kornshell to the same value as g:is_posix.
"
" That's very confusing, so before it happens we'll copy b:is_kornshell's
" value as determined by filetype.vim and ~/.vim/ftdetect/sh.vim into a custom
" variable b:is_ksh, before its meaning gets confused.
"
" b:is_ksh as a name is more inline with b:is_bash and b:is_sh, anyway, so
" we'll just treat b:is_kornshell like it's both misnamed and broken.
"
" We can then switch on our custom variable in ~/.vim/after/syntax/sh.vim to
" apply settings that actually *are* unique to Korn shell and its derivatives.
"
if exists('b:is_kornshell')
  let b:is_ksh = b:is_kornshell
endif

" Use han(1df) as a man(1) wrapper for Bash files if available
if exists('b:is_bash') && executable('han')
  setlocal keywordprg=han
endif