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function! indent#spaces(...) abort
setlocal expandtab
let &l:shiftwidth = a:0
\ ? a:1
\ : 0
let &l:softtabstop = has#('patch-7.3.693')
\ ? -1
\ : &l:shiftwidth
call indent#undo()
endfunction
function! indent#tabs() abort
setlocal noexpandtab shiftwidth< softtabstop<
call indent#undo()
endfunction
function! indent#undo() abort
if exists('b:undo_indent_set')
return
endif
let l:undo = 'call indent#reset()'
if exists('b:undo_indent')
let b:undo_indent .= '|'.l:undo
else
let b:undo_indent = l:undo
endif
let b:undo_indent_set = 1
endfunction
function! indent#reset() abort
setlocal expandtab< shiftwidth< softtabstop< tabstop<
endfunction
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