Update docs

doc/changelog.asciidoc

@@ -59,6 +59,8 @@ Added
 - New `{protocol}` replacement for `tabs.title.format` and friends.
 - New `-o` flag for `:spawn` to show stdout/stderr in a new tab.
 - Support for incremental search, with a new `search.incremental` setting.
+- New `--rapid` flag for `:command-accept` (bound to `Ctrl-Enter` by default),
+  which allows executing a command in the completion without closing it.
 
 Changed
 ~~~~~~~

doc/help/commands.asciidoc

@@ -1423,8 +1423,13 @@ How many steps to zoom out.
 |==============
 [[command-accept]]
 === command-accept
+Syntax: +:command-accept [*--rapid*]+
+
 Execute the command currently in the commandline.
 
+==== optional arguments
+* +*-r*+, +*--rapid*+: Run the command without closing or clearing the command bar.
+
 [[command-history-next]]
 === command-history-next
 Go forward in the commandline history.

doc/help/settings.asciidoc

@@ -427,6 +427,7 @@ Default:
 * +pass:[<Ctrl-K>]+: +pass:[rl-kill-line]+
 * +pass:[<Ctrl-N>]+: +pass:[command-history-next]+
 * +pass:[<Ctrl-P>]+: +pass:[command-history-prev]+
+* +pass:[<Ctrl-Return>]+: +pass:[command-accept --rapid]+
 * +pass:[<Ctrl-Shift-C>]+: +pass:[completion-item-yank --sel]+
 * +pass:[<Ctrl-Shift-Tab>]+: +pass:[completion-item-focus prev-category]+
 * +pass:[<Ctrl-Tab>]+: +pass:[completion-item-focus next-category]+