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-rw-r--r--src/buffer.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/buffer.c b/src/buffer.c
index ef50e824cb8..ee55ed6bee3 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -3863,6 +3863,9 @@ An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
was modified between BEG and END. PROPERTY is the property name,\n\
and VALUE is the old value.\n\
\n\
+An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
+was adjusted in position by the offset DISTANCE (an integer).\n\
+\n\
An entry of the form POSITION indicates that point was at the buffer\n\
location given by the integer. Undoing an entry of this form places\n\
point at POSITION.\n\