vim-patch:7.4.215

Problem:  Inconsistency: ":sp foo" does not reload "foo", unless "foo"
          is the current buffer. (Liang Li)

Solution: Do not reload the current buffer on a split command.

https://code.google.com/p/vim/source/detail?r=f069a3a0f84451aa498c6c22d8f922d1e695e96d

src/ex_docmd.c

@@ -6364,6 +6364,8 @@ do_exedit (
             ? ECMD_ONE : eap->do_ecmd_lnum,
             (P_HID(curbuf) ? ECMD_HIDE : 0)
             + (eap->forceit ? ECMD_FORCEIT : 0)
+            // After a split we can use an existing buffer.
+            + (old_curwin != NULL ? ECMD_OLDBUF : 0)
             + (eap->cmdidx == CMD_badd ? ECMD_ADDBUF : 0 )
             , old_curwin == NULL ? curwin : NULL) == FAIL) {
       /* Editing the file failed.  If the window was split, close it. */

src/version.c

@@ -246,7 +246,7 @@ static int included_patches[] = {
   //218,
   //217,
   //216,
-  //215,
+  215,
   //214,
   213,
   //212,