Don't add period to summary if entire summary is {include:...} expr…

…ession.

Closes #569

lib/yard/docstring.rb

@@ -173,7 +173,9 @@ def summary
         end
       end
       @summary = self[0..idx]
-      @summary += '.' unless @summary.empty?
+      if !@summary.empty? && @summary !~ /\A\s*\{include:.+\}\s*\Z/
+        @summary += '.'
+      end
       @summary
     end
 

spec/docstring_spec.rb

@@ -83,6 +83,12 @@
       doc.summary.should == "Returns a list of tags specified by +name+ or all tags if +name+ is not specified."
     end
 
+    it "should not attach period if entire summary is include" do
+      YARD.parse_string "# docstring\ndef foo; end"
+      Docstring.new("{include:#foo}").summary.should == '{include:#foo}'
+      Registry.clear
+    end
+
     it "should handle references embedded in summary" do
       Docstring.new("Aliasing {Test.test}. Done.").summary.should == "Aliasing {Test.test}."
     end