Update documentation to fix markdownlint errors (#358)

src/components/Card/README.md

@@ -269,15 +269,15 @@ its accessibility.
 
 ### CardBody
 
-Space your content with CardBody. See [Card Composition](#card-composition) for
+Space your content with CardBody. See [Composition](#composition) for
 all details.
 
 <docoff-react-props src="/components/Card/CardBody.jsx"></docoff-react-props>
 
 ### CardFooter
 
 Separate your card actions with CardFooter. See
-[Card Composition](#card-composition) for all details.
+[Composition](#composition) for all details.
 
 <docoff-react-props src="/components/Card/CardFooter.jsx"></docoff-react-props>
 

src/components/FormLayout/README.md

@@ -187,7 +187,7 @@ work together yet 🎩.
 ## Custom Fields
 
 You can even place any content you need into the FormLayout — just wrap it with
-the [FormLayoutCustomField](#formlayoutcustomfield) component. This layout
+the FormLayoutCustomField component. This layout
 helper ensures your content is properly spaced and aligned with to other
 FormLayout elements. FormLayoutCustomFields are designed to work solely inside
 the FormLayout component.

src/components/Modal/README.md

@@ -98,14 +98,14 @@ See [API](#api) for all available options.
 
 Modal is decomposed into the following components:
 
-- [Modal](#api)
-  - [ModalHeader](#modalheader_1)
-    - [ModalTitle](#modaltitle)
-    - [ModalCloseButton](#modalclosebutton)
-  - [ModalBody](#modalbody_1)
-    - [ModalContent](#modalcontent)
+- Modal
+  - [ModalHeader](#modalheader)
+    - ModalTitle
+    - ModalCloseButton
+  - [ModalBody](#modalbody)
+    - ModalContent
       (may be wrapped with [ScrollView](/components/ScrollView))
-  - [ModalFooter](#modalfooter_1)
+  - [ModalFooter](#modalfooter)
 
 Using different combinations, you can compose different kinds of modals,
 e.g. dialog modal, blocking modal, scrollable modal, etc.

src/components/Toolbar/README.md

@@ -353,10 +353,7 @@ A wrapper for individual toolbar items.
 | `--rui-Toolbar__gap`                                 | Gap between toolbar items                                    |
 | `--rui-Toolbar__gap--dense`                          | Dense gap between toolbar items                              |
 
-[inline-elements]: https://developer.mozilla.org/en-US/docs/Web/HTML/Inline_elements
-[block-elements]: https://developer.mozilla.org/en-US/docs/Web/HTML/Inline_elements
 [grid]: /components/Grid
-[spacing]: /css-helpers/spacing
 [text]: /components/Text
 [React synthetic events]: https://reactjs.org/docs/events.html
 [div]: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/div#attributes

src/docs/css-helpers/colors.md

@@ -1,8 +1,5 @@
 # Colors
 
-import { Playground } from 'docz'
-import { Placeholder } from '../_components/Placeholder/Placeholder'
-
 Helpers for text and background.
 
 ## Text Colors