fix whitespace/nbsp?

decode.rkt

@@ -275,19 +275,19 @@
 
 
 
-;; recursive whitespace test
-(define+provide/contract (whitespace? x)  
-  (any/c . -> . coerce/boolean?)
+(define+provide/contract (whitespace? x [nbsp? #f])
+  ((any/c)(boolean?) . ->* . coerce/boolean?)
+  (define pat (pregexp (format "^[\\s~a]+$" (if nbsp? #\u00A0 ""))))
   (cond
     [(equal? "" x) #t] ; empty string is deemed whitespace
-    [(or (string? x) (symbol? x)) (regexp-match #px"^\\s+$" (->string x))]
-    [(or (list? x) (vector? x)) (andmap whitespace? (->list x))]
+    [(or (string? x) (symbol? x)) (regexp-match pat (->string x))]
+    [(or (list? x) (vector? x)) (and (not (empty? x)) (andmap (λ(i) (whitespace? i nbsp?)) (->list x)))] ; andmap returns #t for empty lists
     [else #f]))
 
-
-(define+provide/contract (whitespace/nbsp? x)  
+(define+provide/contract (whitespace/nbsp? x)
   (any/c . -> . coerce/boolean?)
-  (or (whitespace? x) (equal? (->string x) (->string #\u00A0))))
+  (whitespace? x #t))
+
 
 ;; is x a paragraph break?
 (define+provide/contract (paragraph-break? x #:separator [sep world:paragraph-separator])

tests/tests-decode.rkt

@@ -1,5 +1,5 @@
 #lang racket/base
-(require pollen/decode rackunit txexpr)
+(require pollen/decode racket/format rackunit txexpr)
 
 (check-true (begin (register-block-tag 'barfoo) (block-txexpr? '(barfoo "foo"))))
 
@@ -42,3 +42,10 @@
 (check-equal? (merge-newlines '(p "\n" "foo" "\n" "\n" "bar" (em "\n" "\n" "\n"))) 
               '(p "\n" "foo" "\n\n" "bar" (em "\n\n\n")))
 
+
+(check-true (whitespace? " "))
+(check-false (whitespace? (~a #\u00A0)))
+(check-true (whitespace/nbsp? (~a #\u00A0)))
+(check-true (whitespace/nbsp? (vector (~a #\u00A0))))
+(check-false (whitespace? (format " ~a " #\u00A0)))
+(check-true (whitespace/nbsp? (format " ~a " #\u00A0)))