diff --git a/autoload/gitgutter/diff_highlight.vim b/autoload/gitgutter/diff_highlight.vim
index 6ffe657..ec21b44 100644
--- a/autoload/gitgutter/diff_highlight.vim
+++ b/autoload/gitgutter/diff_highlight.vim
@@ -106,8 +106,8 @@ function! s:diff(rline, aline, rlinenr, alinenr, rprefix, aprefix, regions, whol
   if len(lcs) > s:gap_between_regions
     let redits = s:split(rtext, lcs)
     let aedits = s:split(atext, lcs)
-    call s:diff(redits[0], aedits[0], a:rlinenr, a:alinenr, prefix+1,                         prefix+1,                         a:regions, 0)
-    call s:diff(redits[1], aedits[1], a:rlinenr, a:alinenr, prefix+1+len(redits[0])+len(lcs), prefix+1+len(aedits[0])+len(lcs), a:regions, 0)
+    call s:diff(redits[0], aedits[0], a:rlinenr, a:alinenr, a:rprefix+prefix+1,                         a:aprefix+prefix+1,                         a:regions, 0)
+    call s:diff(redits[1], aedits[1], a:rlinenr, a:alinenr, a:rprefix+prefix+1+len(redits[0])+len(lcs), a:aprefix+prefix+1+len(aedits[0])+len(lcs), a:regions, 0)
     return
   endif
 
diff --git a/test/test_gitgutter.vim b/test/test_gitgutter.vim
index 6e0a9e6..2b31572 100644
--- a/test/test_gitgutter.vim
+++ b/test/test_gitgutter.vim
@@ -1030,6 +1030,9 @@ function Test_diff_highlight()
 
   let hunk = ['-gross_value: transaction.unexplained_amount', '+gross_value: amount(transaction)']
   call assert_equal([[2, '+', 15, 21], [1, '-', 26, 44], [2, '+', 33, 33]], gitgutter#diff_highlight#process(hunk))
+
+  let hunk = ['-gem "contact_sport", "~> 1.0.2"', '+gem ("contact_sport"), "~> 1.2"']
+  call assert_equal([[2, '+', 6, 6], [2, '+', 22, 22], [1, '-', 28, 29]], gitgutter#diff_highlight#process(hunk))
 endfunction
 
 
@@ -1039,3 +1042,10 @@ function Test_lcs()
   call assert_equal('bar', gitgutter#diff_highlight#lcs('foobarbaz', 'bbart'))
   call assert_equal('transaction', gitgutter#diff_highlight#lcs('transaction.unexplained_amount', 'amount(transaction)'))
 endfunction
+
+
+function Test_split()
+  call assert_equal(['foo', 'baz'], gitgutter#diff_highlight#split('foobarbaz', 'bar'))
+  call assert_equal(['', 'barbaz'], gitgutter#diff_highlight#split('foobarbaz', 'foo'))
+  call assert_equal(['foobar', ''], gitgutter#diff_highlight#split('foobarbaz', 'baz'))
+endfunction