patch 7.4.1925
Problem:    Viminfo does not merge file marks properly.
Solution:   Use a timestamp.  Add the :clearjumps command.
diff --git a/src/ex_cmds.h b/src/ex_cmds.h
index e2b30f2..5053e60 100644
--- a/src/ex_cmds.h
+++ b/src/ex_cmds.h
@@ -316,6 +316,9 @@
 EX(CMD_close,		"close",	ex_close,
 			BANG|RANGE|NOTADR|COUNT|TRLBAR|CMDWIN,
 			ADDR_WINDOWS),
+EX(CMD_clearjumps,	"clearjumps",	ex_clearjumps,
+			TRLBAR|CMDWIN,
+			ADDR_LINES),
 EX(CMD_cmap,		"cmap",		ex_map,
 			EXTRA|TRLBAR|NOTRLCOM|USECTRLV|CMDWIN,
 			ADDR_LINES),