Symbols sidebar: Extra double-quotes showing up in UI

[varungandhi-src]

Heading names showing up incorrectly in the 'Symbols' sidebar here:

https://sourcegraph.com/github.com/sourcegraph/sourcegraph@008d572e1e9c79b28d0feaf48b09b9dffb2f1152/-/blob/internal/codeintel/uploads/internal/commitgraph/README.md

Seems like the frontend is attempting to use the containerName field directly, but it's unclear what the semantics of that are supposed to be. Based on the GraphQL schema entry for containerName, it's unclear what the semantics of it are supposed to be.

Here is a part of the GraphQL response.

{
	"3": {
		"__typename": "Symbol",
		"name": "Visibility rules",
		"containerName": "commitgraph\"\"The annotated commit graph",
		"kind": "UNKNOWN",
		"language": "Markdown",
		"location": {
			"resource": {
				"path": "internal/codeintel/uploads/internal/commitgraph/README.md",
				"__typename": "CodeIntelGitBlob"
			},
			"range": {
				"start": {
					"line": 35,
					"character": 5,
					"__typename": "Position"
				},
				"end": {
					"line": 35,
					"character": 21,
					"__typename": "Position"
				},
				"__typename": "Range"
			},
			"__typename": "Location"
		},
		"url": "/github.com/sourcegraph/sourcegraph@008d572e1e9c79b28d0feaf48b09b9dffb2f1152/-/blob/internal/codeintel/uploads/internal/commitgraph/README.md?L36:6-36:22"
	}
}