MC-3150: Update dev docs for row appearances

- Update docs for new master format for contained rows

Author: davemacaulay

app/code/Magento/PageBuilder/docs/master-format.md

@@ -60,6 +60,27 @@ PageBuilder uses XHTML with inline styles and data attributes as the master form
 
 ## Row
 
+#### Contained:
+```
+<div class="row-contained" data-element="wrapper" data-role="row" data-appearance="contained">
+    <div style="..."></div>
+</div>
+```
+
+### wrapper element
+1. data-element [main]
+2. data-role [row]
+3. data-appearance [contained]
+
+### main element
+
+Attributes
+4. data-enable-parallax [1, 0]
+5. data-parallax-speed [0-1]
+6. data-background-color-format [hex, rgb, hsl, hsv, name, none]
+7. class
+
+#### Full Width & Full Bleed:
 ```
 <div data-element="main" data-role="row" data-appearance="contained" style="..."></div>
 ```
@@ -69,7 +90,7 @@ PageBuilder uses XHTML with inline styles and data attributes as the master form
 Attributes
 1. data-element [main]
 2. data-role [row]
-3. data-appearance [contained, full-width, full-bleed]
+3. data-appearance [full-width, full-bleed]
 4. data-enable-parallax [1, 0]
 5. data-parallax-speed [0-1]
 6. data-background-color-format [hex, rgb, hsl, hsv, name, none]
@@ -94,15 +115,6 @@ Inline styles
 16. display
 17. flex-direction
 
-All 3 appearances share the same master format template
-```html
-<div attr="data.main.attributes"
-     ko-style="Object.assign(data.container.style(), data.main.style())"
-     css="data.main.css">
-    <render args="renderChildTemplate"/>
-</div>
-```
-
 ## Column group
 
 ```