Several issues at the directive documentation

[lgalfaso]

There are several issues at the documentation at http://docs.angularjs.org/guide/directive at the section "Understanding Transclusion and Scopes"

• [minor] The snippet that uses a /dialog/ is missing a closing div
• At the scope definition for /title/ the documentation states that it should be " title: '=', " when in fact it should be " title: '@', "
• At the snippet definition, there is an attribute "visible" that ones expects it to be binded to the parent scope value "show", but at the template and the scope, the value is "show" (this is, the parent "show"). There are several ways to fix this, (a) make the definition at the component scope of "show" from "=" to "=visible", (b) change the name of the attribute from "visible" to "show" or (c) to change the template and scope to use "visible" and not "show" [I would go with the last one to avoid any confusion to however is reading]
• [minor] on the final directive definition, it is missing the properties "restrict: 'E'" and "replace: true"

[petebacondarwin]

I updated the commit message and merged. Thanks!