remove double-parens unicode delimiter -- it was always a bad idea

udelim/defaults.rkt

@@ -2,7 +2,7 @@
 
 (provide
  #%ornate-parens
- #%double-parens
+ #%s-shaped-bag-delim
  #%inequality-brackets
  #%double-inequality-brackets
  #%moon-faces
@@ -16,7 +16,7 @@
   (syntax-case stx ()
     [(ptm e ...) #'(e ...)]))
 (define-syntax #%ornate-parens (make-rename-transformer #'pass-through-list))
-(define-syntax #%double-parens (make-rename-transformer #'pass-through-list))
+(define-syntax #%s-shaped-bag-delim (make-rename-transformer #'pass-through-list))
 (define-syntax #%inequality-brackets (make-rename-transformer #'pass-through-list))
 (define-syntax #%double-inequality-brackets (make-rename-transformer #'pass-through-list))
 (define-syntax #%moon-faces (make-rename-transformer #'pass-through-list))

udelim/lang/reader.rkt

@@ -21,7 +21,7 @@
         #\﴾ #\﴿ '#%ornate-parens
         #:base-readtable
         (make-list-delim-readtable/wrap
-         #\⸨ #\⸩ '#%double-parens
+         #\⟅ #\⟆ '#%s-shaped-bag-delim
          #:base-readtable
          (make-string-delim-readtable/wrap
           #\｢ #\｣ '#%cjk-corner-quotes

udelim/udelim.scrbl

@@ -16,7 +16,7 @@ Don't consider this library to be stable right now.  Particularly the udelim met
 @section{Guide}
 This is a library I wrote primarily to help make nestable embedding of different syntax in #lang rash, but is generally useful for adding extra types of parenthesis or string delimiters to a language.  After watching Jay McCarthy's talk at Sixth Racketcon, I also decided to steal his idea of making different types of parenthesis wrap their contents with an additional #%symbol.
 
-You can use the udelim meta-language (eg #lang udelim racket/base) to add a few extra parenthesis types and string types to any language.  Specifically, «» are nestable non-escaping string delimiters (IE «foo «bar»» reads as "foo «bar»"), ｢｣ are like «» but wrapped so ｢foo bar｣ produces (#%cjk-corner-quotes "foo bar"), ﴾foo bar﴿ reads as (#%ornate-parens foo bar), ⦓foo bar⦔ reads as (#%inequality-brackets foo bar), ⦕foo bar⦖ reads as (#%double-inequality-brackets foo bar), 🌜foo bar🌛 reads as (#%moon-faces foo bar), and ⸨foo bar⸩ reads as (#%double-parens foo bar).  To get default meanings for the #% identifiers (currently just pass-through macros), use (require udelim/defaults).
+You can use the udelim meta-language (eg #lang udelim racket/base) to add a few extra parenthesis types and string types to any language.  Specifically, «» are nestable non-escaping string delimiters (IE «foo «bar»» reads as "foo «bar»"), ｢｣ are like «» but wrapped so ｢foo bar｣ produces (#%cjk-corner-quotes "foo bar"), ﴾foo bar﴿ reads as (#%ornate-parens foo bar), ⦓foo bar⦔ reads as (#%inequality-brackets foo bar), ⦕foo bar⦖ reads as (#%double-inequality-brackets foo bar), 🌜foo bar🌛 reads as (#%moon-faces foo bar), and ⟅foo bar⟆ reads as (#%s-shaped-bag-delim foo bar).  To get default meanings for the #% identifiers (currently just pass-through macros), use (require udelim/defaults).
 
 @section{Reference}