diff --git a/runtime/doc/undo.txt b/runtime/doc/undo.txt
index 3fcc196250bdd2..b3a49dbb7eeaf2 100644
--- a/runtime/doc/undo.txt
+++ b/runtime/doc/undo.txt
@@ -165,13 +165,13 @@ This is explained in the user manual: |usr_32.txt|.
 g-			Go to older text state.  With a count repeat that many
 			times.
 							*:ea* *:earlier*
-:earlier {count}	Go to older text state {count} times.
-:earlier {N}s		Go to older text state about {N} seconds before.
-:earlier {N}m		Go to older text state about {N} minutes before.
-:earlier {N}h		Go to older text state about {N} hours before.
-:earlier {N}d		Go to older text state about {N} days before.
+:ea[rlier] {count}	Go to older text state {count} times.
+:ea[rlier] {N}s		Go to older text state about {N} seconds before.
+:ea[rlier] {N}m		Go to older text state about {N} minutes before.
+:ea[rlier] {N}h		Go to older text state about {N} hours before.
+:ea[rlier] {N}d		Go to older text state about {N} days before.
 
-:earlier {N}f		Go to older text state {N} file writes before.
+:ea[rlier] {N}f		Go to older text state {N} file writes before.
 			When changes were made since the last write
 			":earlier 1f" will revert the text to the state when
 			it was written.  Otherwise it will go to the write
@@ -184,13 +184,13 @@ g-			Go to older text state.  With a count repeat that many
 g+			Go to newer text state.  With a count repeat that many
 			times.
 							*:lat* *:later*
-:later {count}		Go to newer text state {count} times.
-:later {N}s		Go to newer text state about {N} seconds later.
-:later {N}m		Go to newer text state about {N} minutes later.
-:later {N}h		Go to newer text state about {N} hours later.
-:later {N}d		Go to newer text state about {N} days later.
+:lat[er] {count}		Go to newer text state {count} times.
+:lat[er] {N}s		Go to newer text state about {N} seconds later.
+:lat[er] {N}m		Go to newer text state about {N} minutes later.
+:lat[er] {N}h		Go to newer text state about {N} hours later.
+:lat[er] {N}d		Go to newer text state about {N} days later.
 
-:later {N}f		Go to newer text state {N} file writes later.
+:lat[er] {N}f		Go to newer text state {N} file writes later.
 			When at the state of the last file write, ":later 1f"
 			will go to the newest text state.