🏗 Ensure that z-index table is up to date

[alanorozco]

Successful --fix run: (truncated)

gulp get-zindex --fix

[10:10:23] Using gulpfile ~/git/amphtml/gulpfile.js
[10:10:23] Starting 'get-zindex'...

diff --git a/css/Z_INDEX.md b/css/Z_INDEX.md
index 437b768da..a1c673789 100644
--- a/css/Z_INDEX.md
+++ b/css/Z_INDEX.md
@@ -1,7 +1,9 @@
-Run `gulp get-zindex` to generate this file.
+Run `gulp get-zindex --fix` to generate this file.
 
 | selector                                     | z-index    | file                                      |
-| -------------------------------------------- | ---------- | --------------------------------------- |
+| -------------------------------------------- | ---------- | ----------------------------------------- |
 | .i-amphtml-expanded-mode amp-story-grid-lay  | auto       | extensions/amp-story/1.0/amp-story.css    |
 | .i-amphtml-expanded-mode amp-story-grid-lay  | auto       | extensions/amp-story/1.0/amp-story.css    |
+| amp-sidebar::part(c)                         | inherit    | extensions/amp-sidebar/1.0/amp-sidebar.cs |
+| amp-sidebar::part(sidebar)                   | inherit    | extensions/amp-sidebar/1.0/amp-sidebar.cs |
 | amp-story amp-consent                        | initial    | extensions/amp-story/1.0/amp-story.css    |
@@ -9,4 +11,6 @@ Run `gulp get-zindex` to generate this file.
 | .amp-access-scroll-sheet                     | 2147483647 | extensions/amp-access-scroll/0.1/amp-acce |
+| .i-amphtml-onetap-google-iframe              | 2147483647 | extensions/amp-onetap-google/0.1/amp-onet |
 | amp-sidebar                                  | 2147483647 | extensions/amp-sidebar/0.1/amp-sidebar.cs |
 | amp-sidebar                                  | 2147483647 | extensions/amp-sidebar/0.2/amp-sidebar.cs |
+| amp-sidebar                                  | 2147483647 | extensions/amp-sidebar/1.0/amp-sidebar.cs |
 | .amp-apester-fullscreen                      | 2147483646 | extensions/amp-apester-media/0.1/amp-apes |
@@ -59,3 +63,5 @@ Run `gulp get-zindex` to generate this file.
 | amp-app-banner                               | 13         | extensions/amp-app-banner/0.1/amp-app-ban |
+| amp-ad-sticky-padding                        | 12         | extensions/amp-ad/0.1/amp-ad.css          |
 | amp-sticky-ad-top-padding                    | 12         | extensions/amp-sticky-ad/1.0/amp-sticky-a |
+| amp-ad[sticky]                               | 11         | extensions/amp-ad/0.1/amp-ad.css          |
 | amp-sticky-ad                                | 11         | extensions/amp-sticky-ad/1.0/amp-sticky-a |
@@ -72,2 +78,3 @@ Run `gulp get-zindex` to generate this file.
 | .i-amphtml-image-slider-bar                  | 3          | extensions/amp-image-slider/0.1/amp-image |
+| amp-story-cta-layer                          | 3          | extensions/amp-story-auto-ads/0.1/amp-sto |
 | amp-story-page[active] .i-amphtml-story-pag  | 3          | extensions/amp-story/1.0/amp-story-page-a |
@@ -82,2 +89,3 @@ Run `gulp get-zindex` to generate this file.
 | amp-story-grid-layer                         | 2          | extensions/amp-story/1.0/amp-story.css    |
+| .amp-story-player-exit-control-button        | 1          | css/amp-story-player-iframe.css           |
 | .i-amphtml-layout-size-defined > [fallback]  | 1          | css/ampshared.css                         |
@@ -86,3 +94,3 @@ Run `gulp get-zindex` to generate this file.
 | .amp-video-eq                                | 1          | css/video-autoplay.css                    |
-| i-amphtml-video-mask                         | 1          | css/video-autoplay.css                  |
+| .i-amphtml-video-mask                        | 1          | css/video-autoplay.css                    |
 | amp-addthis .i-amphtml-addthis-close         | 1          | extensions/amp-addthis/0.1/amp-addthis.cs |

[10:10:23] Wrote css/Z_INDEX.md
[10:10:23] Finished 'get-zindex' after 720 ms

A check failure run is the same, except it errors-out when the table is incomplete.

[amp-owners-bot]

Hey @rsimha! These files were changed:

build-system/pr-check/checks.js

[alanorozco]

@raxsha @processprocess @lannka @gmajoulet

PSA for people who've modified css/Z_INDEX.md in the past. (Thank you for your dilligence!)

The command to update said file now requires --fix:

gulp get-zindex --fix