scribble/lp2: declare doc submodule with module*

Using `module*` allows the documentation submodule to refer to the
implementation module.

scribble-doc/scribblings/scribble/lp.scrbl

@@ -62,7 +62,16 @@ submodule, which is recognized by tools such as @exec{raco scribble}.
 The content of the @racket[chunk] and @racket[CHUNK] forms is
 stitched together as the immediate content of the module.
 
-@history[#:added "1.8"]
+The @racket[chunk] and @racket[CHUNK] content is discovered by first
+@racket[expand]ing the module as written. The content is collected
+into a new module, and then the original module content is placed into
+a @racket[doc] submodule that is expanded (so that the content is
+effectively re-expanded). The @racketidfont{doc} submodule is declared
+with @racket[module*].
+
+@history[#:added "1.8"
+         #:changed "1.17" @elem{Declared the @racketidfont{doc} submodule with
+                                @racket[module*] instead of @racket[module].}]
 
 @defform[(chunk id form ...)]{
 

scribble-lib/info.rkt

@@ -23,4 +23,4 @@
 
 (define pkg-authors '(mflatt eli))
 
-(define version "1.16")
+(define version "1.17")

scribble-lib/scribble/lp/lang/common.rkt

@@ -101,7 +101,7 @@
                                         (begin body0 . body)))])
                               (syntax-case submod ()
                                 [(_ . rest)
-                                 (datum->syntax submod (cons #'module #'rest))])))
+                                 (datum->syntax submod (cons #'module* #'rest))])))
                            '())))]))]))
 
 (define-syntax module-begin/plain (make-module-begin #f))