try out a new way to explain when-foo and unless-foo

core/sequences/sequences-docs.factor

@@ -337,7 +337,7 @@ HELP: if-empty
 
 HELP: when-empty
 { $values
-     { "seq" sequence } { "quot1" quotation } }
+     { "seq" sequence } { "quot1" "the first quotation of an " { $link if-empty } } }
 { $description "Makes an implicit check if the sequence is empty. An empty sequence is dropped and the " { $snippet "quot1" } " is called." }
 { $examples "This word is equivalent to " { $link if-empty } " with an empty second quotation:"
     { $example
@@ -354,7 +354,7 @@ HELP: when-empty
 
 HELP: unless-empty
 { $values
-     { "seq" sequence } { "quot2" quotation } }
+     { "seq" sequence } { "quot2" "the second quotation of an " { $link if-empty } } }
 { $description "Makes an implicit check if the sequence is empty. An empty sequence is dropped. Otherwise, the " { $snippet "quot2" } " is called on the sequence.." }
 { $examples "This word is equivalent to " { $link if-empty } " with an empty first quotation:"
     { $example