Merge pull request #823 from nxadm/master

Remove $ from constant

Author: nxadm

doc/Language/modules.pod6

@@ -117,7 +117,7 @@ them with the L<is export> trait.
     unit module MyModule;
     our $var is export = 3;
     sub foo is export { ... };
-    constant $FOO is export = "foobar";
+    constant FOO is export = "foobar";
     enum FooBar is export <one two three>;
 
     # Packages like classes can be exported too