updated for version 7.3.1293
Problem: Put in empty buffer cannot be undone.
Solution: Save one more line for undo. (Ozaki)
diff --git a/src/ops.c b/src/ops.c
index eaad703..ab3d636 100644
--- a/src/ops.c
+++ b/src/ops.c
@@ -3499,7 +3499,7 @@
++lnum;
/* In an empty buffer the empty line is going to be replaced, include
* it in the saved lines. */
- if ((bufempty() ? u_save(0, 1) : u_save(lnum - 1, lnum)) == FAIL)
+ if ((bufempty() ? u_save(0, 2) : u_save(lnum - 1, lnum)) == FAIL)
goto end;
#ifdef FEAT_FOLDING
if (dir == FORWARD)