Issue #4987

Closes #4986

Though the decorator proposal doesn't support this, it is
apparently something TypeScript adds.

Closes #4959

Issue #4981

@param specified in a template comment is older but still supported way of
declaring a parameter. The comment must directly precede {template}.

Reference: https://developers.google.com/closure/templates/docs/concepts#namespace-decl

To avoid matching words that happen to consist of a-f.

Closes #4966

Issue #4960

Issue #4960

Closes #4960

Reference: https://developers.google.com/closure/templates/docs/concepts#injecteddata

Closes #4942

Closes #4947

Closes #4941

Closes #4933

Closes #4918

Closes #4917

Closes #4916

Closes #4915

Issue #4909

Issue #4908

Issue #4910

Closes #4887

Closes #4902

Signed-off-by: Yvonnick Esnault <yvonnick.esnault@corp.ovh.com>

Closes #4892