Include declared_path in 'No podspec found..' error message for PathSource (ref #1825)

lib/cocoapods/external_sources.rb

@@ -378,7 +378,7 @@ module Pod
         pathname      = Pathname.new(absolute_path)
 
         unless pathname.exist?
-          raise Informative, "No podspec found for `#{name}` in `#{params[:local]}`"
+          raise Informative, "No podspec found for `#{name}` in `#{declared_path}`"
         end
         pathname
       end

spec/unit/external_sources_spec.rb

@@ -295,7 +295,7 @@ module Pod
       it "raises if the podspec cannot be found" do
         @external_source.stubs(:params).returns(:path => temporary_directory)
         e = lambda { @external_source.send(:podspec_path) }.should.raise Informative
-        e.message.should.match /No podspec found/
+        e.message.should.match /No podspec found for `Reachability` in `#{temporary_directory}`/
       end
     end
   end