Mark macros as experimental in docs

Given that currently macro does not integrate well with registers and
the internal representation of macros is expected to be changed.

book/src/keymap.md

@@ -77,8 +77,8 @@
 | `Alt-c`     | Change selection (delete and enter insert mode, without yanking)     | `change_selection_noyank` |
 | `Ctrl-a`    | Increment object (number) under cursor                               | `increment`               |
 | `Ctrl-x`    | Decrement object (number) under cursor                               | `decrement`               |
-| `Q`         | Start/stop macro recording to the selected register              | `record_macro`            |
-| `q`         | Play back a recorded macro from the selected register            | `replay_macro`            |
+| `Q`         | Start/stop macro recording to the selected register (experimental)   | `record_macro`            |
+| `q`         | Play back a recorded macro from the selected register (experimental) | `replay_macro`            |
 
 #### Shell
 

helix-term/src/commands.rs

@@ -6031,6 +6031,7 @@ fn record_macro(cx: &mut Context) {
 
 fn replay_macro(cx: &mut Context) {
     let reg = cx.register.unwrap_or('@');
+    // TODO: macro keys should be parsed one by one and not space delimited (see kak)
     let keys: Vec<KeyEvent> = if let Some([keys]) = cx.editor.registers.read(reg) {
         match keys.split_whitespace().map(str::parse).collect() {
             Ok(keys) => keys,