Make docstrings consistent

Author: tcbegley

src/components/input/Textarea.js

@@ -175,7 +175,13 @@ Textarea.propTypes = {
   ]),
 
   /**
-   * Indicates whether this element is required to fill out or not.
+   * This attribute specifies that the user must fill in a value before
+   * submitting a form. It cannot be used when the type attribute is hidden,
+   * image, or a button type (submit, reset, or button). The :optional and
+   * :required CSS pseudo-classes will be applied to the field as appropriate.
+   * required is an HTML boolean attribute - it is enabled by a boolean or
+   * 'required'. Alternative capitalizations `REQUIRED`
+   * are also acccepted.
    */
   required: PropTypes.oneOfType([
     PropTypes.oneOf(['required', 'REQUIRED']),