core(object-alt): remove md syntax around "alt"

lighthouse-core/audits/accessibility/object-alt.js

@@ -15,9 +15,9 @@ const i18n = require('../../lib/i18n/i18n.js');
 
 const UIStrings = {
   /** Title of an accesibility audit that evaluates if all object elements have an alt HTML attribute that describes their contents. This title is descriptive of the successful state and is shown to users when no user action is required. */
-  title: '`<object>` elements have `[alt]` text',
+  title: '`<object>` elements have alt text',
   /** Title of an accesibility audit that evaluates if all object elements have an alt HTML attribute that describes their contents. This title is descriptive of the failing state and is shown to users when there is a failure that needs to be addressed. */
-  failureTitle: '`<object>` elements do not have `[alt]` text',
+  failureTitle: '`<object>` elements do not have alt text',
   /** Description of a Lighthouse audit that tells the user *why* they should try to pass. This is displayed after a user expands the section to see more. No character length limits. 'Learn More' becomes link text to additional documentation. */
   description: 'Screen readers cannot translate non-text content. Adding alt text to ' +
       '`<object>` elements helps screen readers convey meaning to users. ' +

lighthouse-core/scripts/i18n/collect-strings.js

@@ -653,10 +653,6 @@ function resolveMessageCollisions(strings) {
 
   try {
     expect(collidingMessages).toEqual([
-      '$MARKDOWN_SNIPPET_0$ elements do not have $MARKDOWN_SNIPPET_1$ text',
-      '$MARKDOWN_SNIPPET_0$ elements do not have $MARKDOWN_SNIPPET_1$ text',
-      '$MARKDOWN_SNIPPET_0$ elements have $MARKDOWN_SNIPPET_1$ text',
-      '$MARKDOWN_SNIPPET_0$ elements have $MARKDOWN_SNIPPET_1$ text',
       'ARIA $MARKDOWN_SNIPPET_0$ elements do not have accessible names.',
       'ARIA $MARKDOWN_SNIPPET_0$ elements do not have accessible names.',
       'ARIA $MARKDOWN_SNIPPET_0$ elements do not have accessible names.',

lighthouse-core/test/results/sample_v2.json

@@ -4012,7 +4012,7 @@
     },
     "object-alt": {
       "id": "object-alt",
-      "title": "`<object>` elements do not have `[alt]` text",
+      "title": "`<object>` elements do not have alt text",
       "description": "Screen readers cannot translate non-text content. Adding alt text to `<object>` elements helps screen readers convey meaning to users. [Learn more](https://web.dev/object-alt/).",
       "score": 0,
       "scoreDisplayMode": "binary",

third-party/chromium-webtests/webtests/http/tests/devtools/lighthouse/lighthouse-successful-run-expected.txt

@@ -274,7 +274,7 @@ Auditing: Lists contain only `<li>` elements and script supporting elements (`<s
 Auditing: List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
 Auditing: The document does not use `<meta http-equiv="refresh">`
 Auditing: `[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
-Auditing: `<object>` elements have `[alt]` text
+Auditing: `<object>` elements have alt text
 Auditing: No element has a `[tabindex]` value greater than 0
 Auditing: Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
 Auditing: `<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.