[toolbox-optimizer] Fix crash if <template> is the very last element

[eps1lon]

Fixes TypeError: Cannot read properties of null (reading 'firstChild') if a <template> was the last element.

Existing tests didn't catch this since <template> was followed by some whitespace. However, when we manually advance the node, we need to check the enter condition of the loop again since nextNode does not accept a nullable node.

[CLAassistant]

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[Copilot]

Pull Request Overview

This PR fixes a crash in the toolbox optimizer that occurs when a <template> element is the very last element in the DOM, preventing a TypeError when trying to read properties of null.

• Adds a null check after advancing the node when skipping template elements
• Includes regression test with template as the last element without trailing whitespace

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/optimizer/lib/transformers/OptimizeAmpBind.js	Adds null check to prevent crash when template is last element
packages/optimizer/spec/transformers/valid/OptimizeAmpBind/template_last/input.html	Test case with template as final element without whitespace
packages/optimizer/spec/transformers/valid/OptimizeAmpBind/template_last/expected_output.html	Expected output for the regression test

[Copilot]

The else block containing only 'continue' is unnecessary. The continue statement can be moved outside the if-else block since it should execute in both cases when node is not null.

Suggested change

	} else {
	continue;
	}
	}
	continue;