Just fixing some typographic error

Author: JJ

doc/Type/Signature.pod6

@@ -675,7 +675,9 @@ variable name:
 
 X<|aliases>
 =head2 Argument aliases
-The L<colon-pair|/type/Pair> syntax can be used to provide aliases for arguments:
+
+The L<colon-pair|/type/Pair> syntax can be used to provide aliases for
+arguments:
 
     sub alias-named(:color(:$colour), :type(:class($kind))) {
         say $colour ~ " " ~ $kind