better cli syntax for |fuse

pkg/arvo/gen/hood/fuse.hoon

@@ -12,7 +12,10 @@
 |%
 +$  fuse-arg
   $:  des=desk
-      res=[?([%cancel ~] [bas=path con=(list [path germ])])]
+      ::  specified as [germ path] instead of [path germ] so
+      ::  users can write mate//=home= instead of [/=home= %mate]
+      ::
+      res=[?([%cancel ~] [bas=path con=(list [germ path])])]
   ==
 ::
 ++  parse-fuse-source
@@ -21,6 +24,7 @@
   ::  This is a slight overload of the label, but
   ::  it provides a nicer interface for the user so
   ::  we'll go with it.
+  ::
   ?:  ?=([%tas *] r.bec)
     ?:  =(p.r.bec %track)
       [p.bec q.bec %trak]
@@ -51,6 +55,6 @@
   (path-to-fuse-source bas.res.arg)
 %+  turn
   con.res.arg
-|=  [pax=path g=germ]
+|=  [g=germ pax=path]
 ^-  [fuse-source germ]
 [(path-to-fuse-source pax) g]

pkg/arvo/gen/hood/fuse/help.txt

@@ -1,7 +1,7 @@
 Usage:
 
-  |fuse %dest base-beak ~[[/~nel/home= %mate] [/~zod/kids/track %meet]]
-  |fuse %old-desk base-beak ~[[/~nus/test= %only-that]], =overwrite &
+  |fuse %dest base-beak mate//~nel/home= meet//~zod/kids/track
+  |fuse %old-desk base-beak only-that//~nus/test=, =overwrite &
   |fuse %desk-to-cancel-fuse-into %cancel
 
 A %fuse request in clay replaces the contents of %destination-desk
@@ -10,7 +10,7 @@ strategies. This has no dependence on the previous state of %dest
 so any commits/work there will be overwritten.
 
 |fuse extends this concept with the idea of a tracked source. When
-specifying beaks to include in your fuse, specify %trak instead of
+specifying beaks to include in your fuse, specify %track instead of
 a case. This will tell |fuse to retrieve the latest version of the
 source beak AND to rerun the %fuse request whenever that tracked
 source changes. A fuse can have many tracked sources, or none. The