correct `detect-paragraphs` behavior with series of blocks

decode.rkt

@@ -342,18 +342,15 @@
   (define (prep-paragraph-flow xc)
     (linebreak-proc (merge-newlines (trimf xc whitespace?))))
   
-  
   (define my-paragraph-break? (λ(x) (and (paragraph-break? x #:separator sep) #t)))
   
   (define (wrap-paragraph xc) 
     (match xc
-      [(list (? block-txexpr? bx)) bx] ; leave a single block xexpr alone
-      [else (make-txexpr tag empty xc)])) ; otherwise wrap in p tag
-  
+      [(list (? block-txexpr? bxs) ...) bxs] ; leave a series of block xexprs alone
+      [else (list (make-txexpr tag empty xc))])) ; otherwise wrap in p tag
   
   (let ([elements (prep-paragraph-flow elements)]) 
     (if (ormap my-paragraph-break? elements) ; need this condition to prevent infinite recursion
-        (map wrap-paragraph (filter-split elements my-paragraph-break?)) ; split into ¶¶
-        elements)))
-
-
+        ;; use append-map rather than map to permit return of multiple elements
+        (append-map wrap-paragraph (filter-split elements my-paragraph-break?)) ; split into ¶¶
+        elements)))                

tests/tests-decode.rkt

@@ -36,8 +36,23 @@
 (check-equal? (detect-linebreaks '("foo" "moo" "bar") #:insert "moo") '("foo" "moo" "bar"))
 (check-equal? (detect-linebreaks '("foo" "\n\n" "bar")) '("foo" "\n\n" "bar"))
 
-
-
+(check-equal? (detect-paragraphs '("First para" "\n\n" "Second para"))
+              '((p "First para") (p "Second para")))
+(check-equal? (detect-paragraphs '("First para" "\n\n" "Second para" "\n" "Second line"))
+              '((p "First para") (p "Second para" (br) "Second line")))
+(check-equal? (detect-paragraphs '("First para" "\n\n" (div "Second block")))
+              '((p "First para") (div "Second block")))
+(check-equal? (detect-paragraphs '((div "First block") "\n\n" (div "Second block")))
+              '((div "First block") (div "Second block")))
+(check-equal? (detect-paragraphs '("First para" "\n\n" "Second para") #:tag 'ns:p)
+              '((ns:p "First para") (ns:p "Second para")))
+(check-equal? (detect-paragraphs '("First para" "\n\n" "Second para" "\n" "Second line")
+                                 #:linebreak-proc (λ(x) (detect-linebreaks x #:insert '(newline))))
+              '((p "First para") (p "Second para" (newline) "Second line")))
+(check-equal? (detect-paragraphs '("foo" "\n\n" (div "bar") (div "zam")))
+              '((p "foo") (div "bar") (div "zam")))
+(check-equal? (detect-paragraphs '("foo" "\n\n" (div "bar") "\n\n" (div "zam")))
+              '((p "foo") (div "bar") (div "zam")))
 
 (check-equal? (merge-newlines '(p "\n" "foo" "\n" "\n" "bar" (em "\n" "\n" "\n"))) 
               '(p "\n" "foo" "\n\n" "bar" (em "\n\n\n")))