1 files changed, 3 insertions, 1 deletions
diff --git a/docs/fs.md b/docs/fs.md
index c257a55d..5afb2614 100644
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -505,7 +505,9 @@ then the text you may edit. A write appends to that text,
 newlines included, and a tag with more than one line takes a row per line on
 screen; truncating `tag` clears it, as acme's `cleartag` does -- the default
 words (`Del`, `Put` and the rest) with it, since they are that text until
-you edit it, so `echo Make > tag` leaves only `Make`; append with `>>` to
+you edit it, so `echo Make > tag` leaves only `Make` -- a truncating write
+drops the one newline that ends what it wrote, which would draw an empty
+row, and keeps any other; append with `>>` to
 keep them, with `printf ' Make' >> tag`: `echo` ends its word with a
 newline, which starts a new line of the tag. The clearing is an edit of the tag like a typed one and its undo
 history is kept: `u` in the tag brings back the text it cleared, words