Removed term ∅ from operators

Also added some terms to the overview, added link to terms documentation.

doc/Language/operators.pod6

@@ -18,7 +18,7 @@ tightest to loosest:
 
     A | Level            |   Examples
     ==+==================+==========
-    N | Terms            |   42 3.14 "eek" qq["foo"] $x :!verbose @$array
+    N | Terms            |   42 3.14 "eek" qq["foo"] $x :!verbose @$array rand time now ∅
     L | Method postfix   |   .meth .\+ .? .* .() .[] .{} .<> .«» .:: .= .^ .:
     N | Autoincrement    |   \+\+ --
     R | Exponentiation   |   **
@@ -536,6 +536,9 @@ L<C<|> a. k. a. I<the flattener>|/routine/|>, which puts it in a list context:
 
     say .perl for | 3,2,[1,0]; # OUTPUT: «3␤2␤[1, 0]␤»
 
+=head1 Terms
+
+Terms have their L<own extended documentation|terms>.
 
 =head1 Method postfix precedence
 
@@ -3323,12 +3326,6 @@ instance, applying it to division will yield an exception.
 =for code
 say [%] ();  # OUTPUT: «(exit code 1) No zero-arg meaning for infix:<%>␤
 
-=head2 term ∅
-
-X<|∅>
-
-Equivalent to set(), aka the X<empty set>, at codepoint U+2205 (EMPTY SET).
-
 =end pod
 
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