Update behavior of :showdoc: directive

Using :showdoc: on a namespace does not apply to child methods / objects

spec/compiler/crystal/tools/doc/directives_spec.cr

@@ -65,7 +65,7 @@ describe Crystal::Doc::Generator do
       generator.must_include?(program.types["Foo"]).should be_false
     end
 
-    it "shows all private and protected methods in a :showdoc: namespace" do
+    it "does not include documentation for private and protected methods and objects in a :showdoc: namespace" do
       program = top_level_semantic(<<-CRYSTAL, wants_doc: true).program
         # :showdoc:
         class Foo
@@ -84,17 +84,11 @@ describe Crystal::Doc::Generator do
         CRYSTAL
 
       generator = Doc::Generator.new program, [""]
-      foo_def = generator.type(program.types["Foo"]).lookup_method("foo").not_nil!
-      foo_def.doc.should eq("Some docs for `foo`")
-      foo_def.visibility.should eq("private")
 
-      bar_def = generator.type(program.types["Foo"]).lookup_method("bar").not_nil!
-      bar_def.doc.should eq("Some docs for `bar`")
-      bar_def.visibility.should eq("protected")
+      generator.type(program.types["Foo"]).lookup_method("foo").should be_nil
+      generator.type(program.types["Foo"]).lookup_method("bar").should be_nil
 
-      baz_class = generator.type(program.types["Foo"]).lookup_path("Baz").not_nil!
-      baz_class.doc.should eq("Some docs for `Baz`")
-      baz_class.visibility.should eq("private")
+      generator.must_include?(generator.type(program.types["Foo"]).lookup_path("Baz")).should be_false
     end
 
     it "doesn't show a method marked :nodoc: within a :showdoc: namespace" do
@@ -103,7 +97,7 @@ describe Crystal::Doc::Generator do
         class Foo
           # :nodoc:
           # Some docs for `foo`
-          private def foo
+          def foo
           end
         end
         CRYSTAL

src/compiler/crystal/tools/doc/generator.cr

@@ -221,17 +221,7 @@ class Crystal::Doc::Generator
   end
 
   def showdoc?(obj : Crystal::Type)
-    return false if !@program.wants_doc?
-
-    if showdoc?(obj.doc.try &.strip)
-      return true
-    end
-
-    obj.each_namespace do |ns|
-      return true if showdoc?(ns.doc.try &.strip)
-    end
-
-    false
+    showdoc?(obj.doc.try &.strip)
   end
 
   def crystal_builtin?(type)

src/compiler/crystal/tools/doc/type.cr

@@ -197,7 +197,7 @@ class Crystal::Doc::Type
   end
 
   private def showdoc?(adef)
-    @generator.showdoc?(adef.doc.try &.strip) || @generator.showdoc?(@type)
+    @generator.showdoc?(adef.doc.try &.strip)
   end
 
   private def sort_order(item)