docs: normalize keyboard interaction headers and add escape key (#15241)

Also normalized the sections a bit (titles, tenses, and usage of period).

Fixes #15165

Author: lazarljubenovic

src/cdk/stepper/stepper.md

@@ -54,7 +54,7 @@ resetting it will call `reset` on the underlying form control which clears the v
 - <kbd>RIGHT_ARROW</kbd>: Focuses the next step header
 - <kbd>ENTER</kbd>, <kbd>SPACE</kbd>: Selects the step that the focus is currently on
 - <kbd>TAB</kbd>: Focuses the next tabbable element
-- <kbd>TAB</kbd>+<kbd>SHIFT</kbd>: Focuses the previous tabbable element
+- <kbd>SHIFT</kbd>+<kbd>TAB</kbd>: Focuses the previous tabbable element
 
 ### Accessibility
 The CDK stepper is treated as a tabbed view for accessibility purposes, so it is given

src/lib/autocomplete/autocomplete.md

@@ -112,9 +112,10 @@ autocomplete is attached to using the `matAutocompleteOrigin` directive together
 ```
 
 ### Keyboard interaction
-- <kbd>DOWN_ARROW</kbd>: Next option becomes active.
-- <kbd>UP_ARROW</kbd>: Previous option becomes active.
-- <kbd>ENTER</kbd>: Select currently active item.
+- <kbd>DOWN_ARROW</kbd>: Next option becomes active
+- <kbd>UP_ARROW</kbd>: Previous option becomes active
+- <kbd>ENTER</kbd>: Selects currently active item
+- <kbd>ESCAPE</kbd>: Closes the autocomplete panel
 
 ### Option groups
 `mat-option` can be collected into groups using the `mat-optgroup` element:

src/lib/datepicker/datepicker.md

@@ -346,7 +346,7 @@ the native input and toggle button elements respectively, and they trigger a cal
 should have a placeholder or be given a meaningful label via `aria-label`, `aria-labelledby` or
 `MatDatepickerIntl`.
 
-#### Keyboard shortcuts
+#### Keyboard interaction
 
 The datepicker supports the following keyboard shortcuts:
 

src/lib/menu/menu.md

@@ -137,8 +137,9 @@ with a different set of data, depending on the trigger that opened it:
 - <kbd>DOWN_ARROW</kbd>: Focuses the next menu item
 - <kbd>UP_ARROW</kbd>: Focuses previous menu item
 - <kbd>RIGHT_ARROW</kbd>: Opens the menu item's sub-menu
-- <kbd>LEFT_ARROW</kbd>: Closes the current menu, if it is a sub-menu.
+- <kbd>LEFT_ARROW</kbd>: Closes the current menu, if it is a sub-menu
 - <kbd>ENTER</kbd>: Activates the focused menu item
+- <kbd>ESCAPE</kbd>: Closes the menu
 
 ### Accessibility
 Menu triggers or menu items without text or labels should be given a meaningful label via

src/lib/stepper/stepper.md

@@ -234,9 +234,11 @@ The stepper can now show error states by simply providing the `showError` option
 ### Keyboard interaction
 - <kbd>LEFT_ARROW</kbd>: Focuses the previous step header
 - <kbd>RIGHT_ARROW</kbd>: Focuses the next step header
+- <kbd>HOME</kbd>: Focuses the first step header
+- <kbd>END</kbd>: Focuses the last step header
 - <kbd>ENTER</kbd>, <kbd>SPACE</kbd>: Selects the step that the focus is currently on
 - <kbd>TAB</kbd>: Focuses the next tabbable element
-- <kbd>TAB</kbd>+<kbd>SHIFT</kbd>: Focuses the previous tabbable element
+- <kbd>SHIFT</kbd>+<kbd>TAB</kbd>: Focuses the previous tabbable element
 
 ### Localizing labels
 Labels used by the stepper are provided through `MatStepperIntl`. Localization of these messages

src/lib/tabs/tabs.md

@@ -126,7 +126,7 @@ Tabs without text or labels should be given a meaningful label via `aria-label`
 `aria-labelledby`. For `MatTabNav`, the `<nav>` element should have a label as well.
 
 
-#### Keyboard shortcuts
+#### Keyboard interaction
 
 | Shortcut             | Action                     |
 |----------------------|----------------------------|