moved the docs-complete library into rackunit

to avoid having a separate, new manual for the
  one library

original commit: 507b1cd8fd81cd9c5fcf466a2a0c4c47433b0795

collects/rackunit/scribblings/rackunit.scrbl

@@ -15,6 +15,7 @@ from novices to experts.
 @include-section["quick-start.scrbl"]
 @include-section["philosophy.scrbl"]
 @include-section["api.scrbl"]
+@include-section["utils.scrbl"]
 @include-section["internals.scrbl"]
 @include-section["release-notes.scrbl"]
 @include-section["acknowledgements.scrbl"]

collects/rackunit/scribblings/utils.scrbl

@@ -3,10 +3,10 @@
 @(require scribble/manual
           (for-label racket))
 
-@title{Internal Testing Utilities} 
+@title{Testing Utilities} 
 
 @section{Checking documentation completeness}
-@defmodule[tests/utils/docs-complete]
+@defmodule[rackunit/docs-complete]
 
 @defproc[(check-docs [lib symbol?]
                      [#:skip skip