/commands says what each word does, and that the root's ctl takes Edit

A /commands line gave a word, its argument and root or pane, but not
what it does, and called Edit a pane's word though the root's ctl takes
it too. Each line now ends with -- and the first sentence of the word's
doc comment (read from builtins.zig itself, so there is one copy), and
Edit is both. fs.md says a pane's word such as Undo or Msg is refused at
the root.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/fs.md b/docs/fs.md
index f61bbbe6..04cef2f9 100644
--- a/docs/fs.md
+++ b/docs/fs.md
@@ -109,7 +109,9 @@ Existing Plan9port/v9fs clients need a userspace bridge for QUIC.
              (`--detach`, 80x24 until then; refused while a frontend owns the size),
              from 20x6 to 4096x4096, and refused when the panes it has would not each
              keep their tag and 2 rows; a terminal's pty follows its pane on every resize
-/commands    every builtin: word, `arg` if it takes one, `root` or `pane` (the ctl that takes it), a setting's values
+/commands    every builtin: word, `arg` if it takes one, `root`, `pane` or `both` (the ctl that takes it:
+             Edit is both, at the active pane from the root; a pane's word such as Undo or Msg
+             is refused at the root), a setting's values, then ` -- ` and what it does
 /layout      one line per column, left to right: serial index x width current|notcurrent
              (the column with the keyboard now) empty|full pane-serials...; then active
              <serial>: acme's activecol, which the keyboard leaving for another column's