Fix opening folds inserted by snippets

Commit 13331a8 added code to show the current line after insertions, but
later changes caused that to be called too soon.  This left folds
created by a snippet closed, and the cursor at the end of the insertion.

plugin/UltiSnips/_vim.py

@@ -64,10 +64,6 @@ buf = VimBuffer()
 def text_to_vim(start, end, text):
     lines = text.split('\n')
 
-    # Open any folds this might have created
-    buf.cursor = start
-    vim.command("normal zv")
-
     new_end = _calc_end(lines, start)
 
     before = buf[start.line][:start.col]
@@ -80,6 +76,10 @@ def text_to_vim(start, end, text):
         new_lines[-1] += after
     buf[start.line:end.line + 1] = new_lines
 
+    # Open any folds this might have created
+    buf.cursor = start
+    vim.command("normal zv")
+
     return new_end
 
 def escape(inp):