Fix module sources in docs

The original uses of defmodule were an attempt to clean up "undefined tag" warnings when building docs using `scribble +m` (i.e., outside `raco setup`). It turns out those warnings were a bug in scribble, hopefully fixed in racket/scribble@2e679f4.

- Identifier tooltips in constructs.scrbl correctly name both splitflap/constructs and splitflap as source modules
- Remove unnecessary #:use-sources

Author: otherjoel

splitflap-doc/constructs.scrbl

@@ -19,7 +19,8 @@
 @(define mod-constructs (make-base-eval #:lang 'racket/base))
 @(mod-constructs '(require splitflap gregor racket/file racket/promise))
 
-@defmodule[splitflap/constructs]
+@declare-exporting[splitflap/constructs splitflap]
+@defmodule[splitflap/constructs #:no-declare]{
 
 The format of feeds is specified by the @Atom1.0[] and @RSS2.0[] specifications (and, for all
 practical purposes, by @AppleRequirements[] in the case of podcasts). These in turn reference other
@@ -33,6 +34,8 @@ cases where it makes things simpler, Splitflap is a bit @emph{more} strict than
 The bindings documented in this section are provided by the main @racketmodname[splitflap] module
 as well as by @racketmodname[splitflap/constructs].
 
+}
+
 @section{Tag URIs}
 
 Feeds, and items contained in feeds, require some globally unique identifier. Although any kind of

splitflap-doc/mod-splitflap.scrbl

@@ -13,7 +13,11 @@
               xml)
    (for-syntax racket/base racket/syntax))
 
-@title[#:tag "mod-splitflapp"]{Library Reference}
+@title[#:tag "mod-splitflap"]{Library Reference}
+
+@defmodule[splitflap]
+
+This module also reprovides the bindings from @racketmodname[splitflap/constructs].
 
 @(define mod-feed (make-base-eval #:lang 'racket/base))
 @(mod-feed '(require splitflap))

splitflap-doc/splitflap.scrbl

@@ -8,8 +8,6 @@
 @flipboard-div
 @flipboard-script
 
-@defmodule[splitflap #:use-sources (splitflap/private/feed)]
-
 This library provides a simple interface for building valid Atom and RSS feeds, including podcast
 feeds, for your web properties.