message: Add 'formatAsCode' property to HowToFix property bag, update tests
diff: @@ -21,6 +21,7 @@ Array [
  "identifiers": null,
  "resolution": Object {
  "how-to-fix": Object {
  + "formatAsCode": null,
  "unformattedText": "The text element has insufficient contrast of 1. Foreground color: #ffffff, background color: #ffffff). Modify the text foreground and/or background colors to provide a contrast ratio of at least 4.5:1 for regular text, or 3:1 for large text (at least 18pt, or 14pt+bold).",
  },
  },
  @@ -38,6 +39,10 @@ Array [
  "identifiers": null,
  "resolution": Object {
  "how-to-fix": Object {
  + "formatAsCode": Array [
  + "minWidth",
  + "minHeight",
  + ],
  "unformattedText": "The element has an insufficient target size (width: 32dp, height: 32dp). Set the element's minWidth and minHeight attributes to at least 48dp.",
  },
  },
  @@ -60,6 +65,10 @@ Array [
  "identifiers": null,
  "resolution": Object {
  "how-to-fix": Object {
  + "formatAsCode": Array [
  + "minWidth",
  + "minHeight",
  + ],
  "unformattedText": "The element has an insufficient target size (width: 48dp, height: 48dp). Set the element's minWidth and minHeight attributes to at least 48dp.",
  },
  },
  @@ -82,6 +91,7 @@ Array [
  "identifiers": null,
  "resolution": Object {
  "how-to-fix": Object {
  + "formatAsCode": null,
  "unformattedText": "The text element has insufficient contrast of 21. Foreground color: #ffffff, background color: #000000). Modify the text foreground and/or background colors to provide a contrast ratio of at least 4.5:1 for regular text, or 3:1 for large text (at least 18pt, or 14pt+bold).",
  },
  },
  @@ -94,6 +104,10 @@ Array [
  "identifiers": null,
  "resolution": Object {
  "how-to-fix": Object {
  + "formatAsCode": Array [
  + "minWidth",
  + "minHeight",
  + ],
  "unformattedText": "The element has an insufficient target size (width: 0dp, height: 0dp). Set the element's minWidth and minHeight attributes to at least 48dp.",
  },
  },
  