Move rarely used functions to autoload

autoload/do.vim

@@ -10,6 +10,7 @@ function! do#isort()
   edit!
 endfunction
 
+" Strip white space from right of all lines.
 " TODO: Make do#rstrip_lines work on a range
 function! do#rstrip_lines()
   let l:line = line('.')
@@ -18,3 +19,36 @@ function! do#rstrip_lines()
   nohlsearch
   call cursor(l:line, l:column)
 endfunction
+
+" Set the tab width for the current filetype
+function! do#set_tab_width(width)
+  execute 'setlocal tabstop='.a:width
+  execute 'setlocal shiftwidth='.a:width
+  execute 'setlocal softtabstop='.a:width
+  echo 'Tab width is now '.a:width
+endfunction
+
+" Toggle GitHub style bullet checkbox
+function! do#toggle_checkbox()
+  " Get current line
+  let l:line = getline('.')
+  " Get the ' ' or 'x' character from within the task bullet
+  let l:pattern = '[-\*+] \[\zs[ x]\ze]'
+  let l:char = matchstr(l:line, l:pattern)
+  " Toggle the ' ' or 'x' character
+  if l:char ==? 'x'
+    let l:char = ' '
+  else
+    let l:char = 'x'
+  endif
+  " Replace the current line with a new one
+  call setline(line('.'), substitute(l:line, l:pattern, l:char, ''))
+endfunction
+
+" Show highlight groups under the cursor
+function! do#cursor_highlight_groups()
+  let l:hi = synIDattr(synID(line('.'),col('.'),1),'name')
+  let l:trans = synIDattr(synID(line('.'),col('.'),0),'name')
+  let l:lo = synIDattr(synIDtrans(synID(line('.'),col('.'),1)),'name')
+  echo 'hi<'.l:hi.'> trans<'.l:trans.'> lo<'.l:lo.'>'
+endfunction