go with a non breaking approach

docs/pages/api/container.md

@@ -37,14 +37,13 @@ Any other props supplied will be provided to the root element (native element).
 
 ## CSS
 
-<<<<<<< HEAD
 - Style sheet name: `MuiContainer`.
 - Style sheet details:
 
 | Rule name | Global class | Description |
 |:-----|:-------------|:------------|
 | <span class="prop-name">root</span> | <span class="prop-name">.MuiContainer-root</span> | Styles applied to the root element.
-| <span class="prop-name">disableGutters</span> | <span class="prop-name">.MuiContainer-disableGutters</span> | Styles applied to the inner `component` element if `disableGutters={true}`.
+| <span class="prop-name">disableGutters</span> | <span class="prop-name">.MuiContainer-disableGutters</span> | Styles applied to the root element if `disableGutters={true}`.
 | <span class="prop-name">fixed</span> | <span class="prop-name">.MuiContainer-fixed</span> | Styles applied to the root element if `fixed={true}`.
 | <span class="prop-name">maxWidthXs</span> | <span class="prop-name">.MuiContainer-maxWidthXs</span> | Styles applied to the root element if `maxWidth="xs"`.
 | <span class="prop-name">maxWidthSm</span> | <span class="prop-name">.MuiContainer-maxWidthSm</span> | Styles applied to the root element if `maxWidth="sm"`.
@@ -59,33 +58,6 @@ You can override the style of the component thanks to one of these customization
 - With a theme and an [`overrides` property](/customization/globals/#css).
 
 If that's not sufficient, you can check the [implementation of the component](https://github.com/mui-org/material-ui/blob/master/packages/material-ui/src/Container/Container.js) for more detail.
-=======
-You can override all the class names injected by Material-UI thanks to the `classes` prop.
-This prop accepts the following keys:
-
-
-| Name | Description |
-|:-----|:------------|
-| <span class="prop-name">root</span> | Styles applied to the root element.
-| <span class="prop-name">gutters</span> | Styles applied to the root element if `disableGutters={false}`.
-| <span class="prop-name">fixed</span> | Styles applied to the root element if `fixed={true}`.
-| <span class="prop-name">maxWidthXs</span> | Styles applied to the root element if `maxWidth="xs"`.
-| <span class="prop-name">maxWidthSm</span> | Styles applied to the root element if `maxWidth="sm"`.
-| <span class="prop-name">maxWidthMd</span> | Styles applied to the root element if `maxWidth="md"`.
-| <span class="prop-name">maxWidthLg</span> | Styles applied to the root element if `maxWidth="lg"`.
-| <span class="prop-name">maxWidthXl</span> | Styles applied to the root element if `maxWidth="xl"`.
-
-Have a look at the [overriding styles with classes](/customization/components/#overriding-styles-with-classes) section
-and the [implementation of the component](https://github.com/mui-org/material-ui/blob/master/packages/material-ui/src/Container/Container.js)
-for more detail.
-
-If using the `overrides` [key of the theme](/customization/themes/#css),
-you need to use the following style sheet name: `MuiContainer`.
-
-## Notes
-
-The component is fully [StrictMode](https://reactjs.org/docs/strict-mode.html) compatible.
->>>>>>> update the API wording to target the root
 
 ## Demos
 

packages/material-ui/src/Container/Container.d.ts

@@ -11,7 +11,7 @@ export interface ContainerProps
 
 export type ContainerClassKey =
   | 'root'
-  | 'gutters'
+  | 'disableGutters'
   | 'fixed'
   | 'maxWidthXs'
   | 'maxWidthSm'

packages/material-ui/src/Container/Container.js

@@ -22,8 +22,7 @@ export const styles = theme => ({
       paddingRight: theme.spacing(4),
     },
   },
-  // TODO change style rule to gutters in v5, avoid duplication of CSS.
-  /* Styles applied to the inner `component` element if `disableGutters={true}`. */
+  /* Styles applied to the root element if `disableGutters={true}`. */
   disableGutters: {
     paddingLeft: 0,
     paddingRight: 0,