Expand documentation of loose xor

Add links in loose or / xor to strict sections
Summarize chaining behavior

doc/Language/operators.pod6

@@ -2264,7 +2264,7 @@ behaviour:
 
 =head2 infix C«or»
 
-Same as C<infix ||>, except with looser precedence.
+Same as L<infix C<||>|#infix || >, except with looser precedence.
 
 Returns the first argument that evaluates to C<True> in boolean context,
 or otherwise the last argument, it short-circuits. Please note that C<or> is easy
@@ -2303,10 +2303,17 @@ while a L<Failure> never is:
 
 =head2 infix C«xor»
 
-Returns the argument that evaluates to C<True> in boolean context, if and
-only if the other argument evaluates to C<False> in boolean context. If
-both arguments evaluate to C<True>, returns the last argument. If both
-arguments evalute to C<False>, returns a false value.
+Same as L<infix C<^^>|#infix ^^>, except with looser precedence.
+
+Returns the operand that evaluates to C<True> in boolean context, if and
+only if the other operand evaluates to C<False> in boolean context. If
+both operands evaluate to C<False>, returns the last argument. If both
+operands evalute to C<True>, returns C<Nil>.
+
+When chaining, returns the operand that evaluates to C<True>, if and
+only if there is one such operand. If more than one operand is true,
+it short-cicuits after evaluating the second and returns C<Nil>. If all
+operands are false, returns the last one.
 
 =head1 Sequencer Precedence