Revert "Show sign on first line when line(s) deleted at start of file."

Signs aren't shown for deleted lines which aren't at the start of the
file.

This reverts commit 0fd18d66f6.

README.mkd

@@ -204,7 +204,6 @@ To customise the symbols, add the following to your `~/.vimrc`:
 let g:gitgutter_sign_added = 'xx'
 let g:gitgutter_sign_modified = 'yy'
 let g:gitgutter_sign_removed = 'zz'
-let g:gitgutter_sign_removed_first_line = '^^'
 let g:gitgutter_sign_modified_removed = 'ww'
 ```
 
@@ -277,6 +276,10 @@ let g:gitgutter_realtime = 0
 let g:gitgutter_eager = 0
 ```
 
+> Why is no sign shown if I delete the first line(s) in a file?
+
+vim-gitgutter shows removed lines with a sign on the line above.  In this case there isn't a line above so vim-gitgutter can't show the sign.  In due course I'll fix this with an overline character on the first line.
+
 > What happens if I also use another plugin which uses signs (e.g. Syntastic)?
 
 Vim only allows one sign per line.  Before adding a sign to a line, vim-gitgutter checks whether a sign has already been added by somebody else.  If so it doesn't do anything.  In other words vim-gitgutter won't overwrite another plugin's signs.  It also won't remove another plugin's signs.

autoload/diff.vim

@@ -142,11 +142,7 @@ function! diff#process_added(modifications, from_count, to_count, to_line)
 endfunction
 
 function! diff#process_removed(modifications, from_count, to_count, to_line)
-  if a:to_line == 0
+  call add(a:modifications, [a:to_line, 'removed'])
-    call add(a:modifications, [1, 'removed_first_line'])
-  else
-    call add(a:modifications, [0, 'removed'])
-  endif
 endfunction
 
 function! diff#process_modified(modifications, from_count, to_count, to_line)

autoload/highlight.vim

@@ -34,7 +34,6 @@ function! highlight#define_signs()
   sign define GitGutterLineAdded
   sign define GitGutterLineModified
   sign define GitGutterLineRemoved
-  sign define GitGutterLineRemovedFirstLine
   sign define GitGutterLineModifiedRemoved
   sign define GitGutterDummy
 
@@ -47,7 +46,6 @@ function! highlight#define_sign_text()
   execute "sign define GitGutterLineAdded           text=" . g:gitgutter_sign_added
   execute "sign define GitGutterLineModified        text=" . g:gitgutter_sign_modified
   execute "sign define GitGutterLineRemoved         text=" . g:gitgutter_sign_removed
-  execute "sign define GitGutterLineRemovedFirstLine text=" . g:gitgutter_sign_removed_first_line
   execute "sign define GitGutterLineModifiedRemoved text=" . g:gitgutter_sign_modified_removed
 endfunction
 
@@ -70,7 +68,6 @@ function! highlight#define_sign_text_highlights()
   sign define GitGutterLineAdded           texthl=GitGutterAdd
   sign define GitGutterLineModified        texthl=GitGutterChange
   sign define GitGutterLineRemoved         texthl=GitGutterDelete
-  sign define GitGutterLineRemovedFirstLine texthl=GitGutterDelete
   sign define GitGutterLineModifiedRemoved texthl=GitGutterChangeDelete
 endfunction
 
@@ -79,13 +76,11 @@ function! highlight#define_sign_line_highlights()
     sign define GitGutterLineAdded           linehl=GitGutterAddLine
     sign define GitGutterLineModified        linehl=GitGutterChangeLine
     sign define GitGutterLineRemoved         linehl=GitGutterDeleteLine
-    sign define GitGutterLineRemovedFirstLine linehl=GitGutterDeleteLine
     sign define GitGutterLineModifiedRemoved linehl=GitGutterChangeDeleteLine
   else
     sign define GitGutterLineAdded           linehl=
     sign define GitGutterLineModified        linehl=
     sign define GitGutterLineRemoved         linehl=
-    sign define GitGutterLineRemovedFirstLine linehl=
     sign define GitGutterLineModifiedRemoved linehl=
   endif
 endfunction

autoload/hunk.vim

@@ -54,8 +54,7 @@ function! hunk#prev_hunk(count)
       if hunk[2] < current_line
         let hunk_count += 1
         if hunk_count == a:count
-          let target = hunk[2] == 0 ? 1 : hunk[2]
+          execute 'normal!' hunk[2] . 'G'
-          execute 'normal!' target . 'G'
           break
         endif
       endif
@@ -70,11 +69,6 @@ function! hunk#current_hunk()
   let current_line = line('.')
 
   for hunk in s:hunks
-    if current_line == 1 && hunk[2] == 0
-      let current_hunk = hunk
-      break
-    endif
-
     if current_line >= hunk[2] && current_line < hunk[2] + (hunk[3] == 0 ? 1 : hunk[3])
       let current_hunk = hunk
       break

autoload/utility.vim

@@ -88,8 +88,6 @@ function! utility#highlight_name_for_change(text)
     return 'GitGutterLineAdded'
   elseif a:text ==# 'removed'
     return 'GitGutterLineRemoved'
-  elseif a:text ==# 'removed_first_line'
-    return 'GitGutterLineRemovedFirstLine'
   elseif a:text ==# 'modified'
     return 'GitGutterLineModified'
   elseif a:text ==# 'modified_removed'

doc/gitgutter.txt

@@ -270,7 +270,12 @@ a. Why are the colours in the sign column weird?
   Your colorscheme is configuring the |hl-SignColumn| highlight group weirdly.
   Please see |GitGutterCustomisation| on customising the sign column.
 
-b. What happens if I also use another plugin which uses signs (e.g. Syntastic)?
+b. Why is no sign shown if I delete the first line(s) in a file?
+
+  vim-gitgutter shows removed lines with a sign on the line above.  In this
+  case there isn't a line above so vim-gitgutter can't show the sign.
+
+c. What happens if I also use another plugin which uses signs (e.g. Syntastic)?
 
   Vim only allows one sign per line. Before adding a sign to a line,
   vim-gitgutter checks whether a sign has already been added by somebody else.

plugin/gitgutter.vim

@@ -34,7 +34,6 @@ call s:set('g:gitgutter_eager',                 1)
 call s:set('g:gitgutter_sign_added',            '+')
 call s:set('g:gitgutter_sign_modified',         '~')
 call s:set('g:gitgutter_sign_removed',          '_')
-call s:set('g:gitgutter_sign_removed_first_line', '‾')
 call s:set('g:gitgutter_sign_modified_removed', '~_')
 call s:set('g:gitgutter_diff_args',             '')
 call s:set('g:gitgutter_escape_grep',           0)