inline temps and whitespace, improve update-widget-state

update-widget-state accepts a second parameter which duplicates
information available in self.state. This commit gets rid of
some not all of it

command.fnl

@@ -24,21 +24,15 @@
 
 (define-command
  "switch-to-buffer"
- [[:buffer
-   Buffer.match
-   #(. (Buffer.next $1.buffer) :name)]
-  ]
- (fn [{:frame frame :buffer buffer}]
+ [[:buffer Buffer.match #(. (Buffer.next $1.buffer) :name)]]
+ (fn [{: frame : buffer}]
    (frame:show-buffer buffer)))
 
 (define-command
  "visit-location"
- [[:buffer
-   Buffer.match
-   #$1.buffer.name]
-  [:url  #{$1 $1} #($1.buffer:location)]
-  ]
- (fn [{:url url :buffer buffer}]
+ [[:buffer Buffer.match #$1.buffer.name]
+  [:url  #{$1 $1} #($1.buffer:location)]]
+ (fn [{: url : buffer}]
    (buffer:visit url)))
 
 (define-command
@@ -93,8 +87,7 @@
 
       {:command c :this-param k :collected-params p}
       (let [{ : completer}  (. c.params k)
-            vals (completer input-string)
-            value (. vals input-string)]
+            value (. (completer input-string) input-string)]
         (tset p k value)
         (state-for-next-param c p))
 
@@ -110,20 +103,20 @@
         param (if s.active (. (. s.command :params) s.this-param))]
     (set self.state s)
     {
-     :active s.active
      :error s.error
      :prompt (if s.active (or s.this-param  "Command?" "") "")
      :default (and param (param.default self.frame))
      }))
 
-(fn update-widget-state [{ : widget : entry : completions-widget : prompt} result]
+(fn update-widget-state [{ : state : widget : entry : completions-widget : prompt} result]
   (set prompt.label (or result.prompt ""))
-  (set entry.sensitive result.active)
-  (if (not result.active)
+  (set entry.sensitive state.active)
+  (if (not state.active)
       (completions-widget:hide))
   (set entry.text (or result.default result.error ""))
-  (widget.parent:set_visible_child_name
-   (if result.active "commander" "echo-area")))
+  (match widget.parent
+    p (p:set_visible_child_name
+       (if state.active "commander" "echo-area"))))
 
 (fn on-input [self str]
   (match self.state
@@ -146,17 +139,16 @@
   (tset state :active true)
   (update-widget-state
    self
-   {:active true
+   {
     :prompt (or state.this-param  "Command" "")
     })
-  (entry:grab_focus)
-  state)
+  (entry:grab_focus))
 
 (fn deactivate [{: state : entry : prompt &as self}]
   (doto state
     (lume.clear)
     (tset :active false))
-  (update-widget-state self {:active false}))
+  (update-widget-state self {}))
 
 (fn invoke-interactively [self name params]
   (let [c (find-command name)