Bug 1834967 - Add HTML to the list of items to automatically format with...

Bug 1834967 - Add HTML to the list of items to automatically format with Prettier in VS Code. r=firefox-build-system-reviewers,nalexander

Differential Revision: https://phabricator.services.mozilla.com/D179042

python/mozbuild/mozbuild/backend/mach_commands.py

@@ -159,7 +159,7 @@ def setup_vscode(command_context, interactive):
         },
         # Note, the top-level editor settings are left as default to allow the
         # user's defaults (if any) to take effect.
-        "[javascript][javascriptreact][typescript][typescriptreact][json]": {
+        "[javascript][javascriptreact][typescript][typescriptreact][json][html]": {
             "editor.defaultFormatter": "esbenp.prettier-vscode",
             "editor.formatOnSave": True,
         },
@@ -206,6 +206,13 @@ def setup_vscode(command_context, interactive):
             old_settings.pop(
                 "[javascript][javascriptreact][typescript][typescriptreact]"
             )
+        if (
+            "[javascript][javascriptreact][typescript][typescriptreact][json]"
+            in old_settings
+        ):
+            old_settings.pop(
+                "[javascript][javascriptreact][typescript][typescriptreact][json]"
+            )
 
         settings = {**old_settings, **new_settings}