Provide "i"

This is a weird one, and might get axed.

autoload/fugitive.vim

@@ -1553,8 +1553,8 @@ function! fugitive#BufReadStatus() abort
     exe "nnoremap <buffer> <silent>" nowait "u :<C-U>execute <SID>Do('Unstage',0)<CR>"
     exe "xnoremap <buffer> <silent>" nowait "u :<C-U>execute <SID>Do('Unstage',1)<CR>"
     nnoremap <buffer> <silent> C :<C-U>Gcommit<CR>:echohl WarningMsg<Bar>echo ':Gstatus C is deprecated in favor of cc'<Bar>echohl NONE<CR>
-    nnoremap <buffer> <silent> a :<C-U>execute <SID>StageInline('toggle',line('.'),v:count)<CR>
+    nnoremap <buffer> <silent> a :<C-U>execute <SID>StatusDo('Toggle',0)<CR>
-    nnoremap <buffer> <silent> i :<C-U>execute <SID>StageInline('toggle',line('.'),v:count)<CR>
+    nnoremap <buffer> <silent> i :<C-U>execute <SID>StageIntend(v:count1)<CR>
     exe 'nnoremap <buffer> <silent>' nowait "= :<C-U>execute <SID>StageInline('toggle',line('.'),v:count)<CR>"
     exe 'nnoremap <buffer> <silent>' nowait "< :<C-U>execute <SID>StageInline('show',  line('.'),v:count)<CR>"
     exe 'nnoremap <buffer> <silent>' nowait "> :<C-U>execute <SID>StageInline('hide',  line('.'),v:count)<CR>"
@@ -2359,6 +2359,23 @@ function! s:StageInline(mode, ...) abort
   return lnum
 endfunction
 
+function! s:StageIntend(count) abort
+  for i in range(a:count)
+    if getline('.')[0:1] ==# '? '
+      call s:TreeChomp('add', '--intent-to-add', '--', s:Tree() . '/' . getline('.')[2:-1])
+      -
+      exe s:ReloadStatus()
+    elseif getline('.') =~# '^Unstaged'
+      call s:TreeChomp('add', '--intent-to-add', '--', s:Tree())
+      exe s:ReloadStatus()
+    else
+      call s:StageInline('show', line('.'), 1)
+    endif
+    call s:StageNext(1)
+  endfor
+  return '.'
+endfunction
+
 function! s:StageDiff(diff) abort
   let lnum = line('.')
   let info = s:StageInfo(lnum)

doc/fugitive.txt

@@ -273,6 +273,11 @@ X                       Discard the change under the cursor.  This uses
                                                 *fugitive_>*
 >                       Remove the inline diff of the file under the cursor.
 
+                                                *fugitive_i*
+i                       On untracked files, call |:Git| add --intent-to-add.
+                        Otherwise, move to next hunk, expanding inline diffs
+                        automatically.
+
                                                 *fugitive_dd*
 dd                      Perform a |:Gdiff| on the file under the cursor.