Issue #5013

To avoid bad parses when unary and binary operators are squashed
together without spaces.

Issue #5013

Closes #5009

Closes #4999

When submitting the previous commit, I had not noticed that the parameter allowAtxHeaderWithoutSpace had type Object instead of type boolean. I've fixed this now.

Adding documentation for the `allowAtxHeaderWithoutSpace` configuration parameter.

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