text/template: not documented that the $ is root variable.

[kybin]

Inside of {{range (root).A}} loop, I wanted use (root).B. But intead it refers (root).A.B.

I noticed it's expected behavior, but I couldn't find what is the root variable in the document of text/template but found in stackoverflow.

I think we need explanation of what is root variable in the standard document of text/template.

The variable $ is documented in the section on variables:

When execution begins, $ is set to the data argument passed to Execute, that is, to the starting value of dot.

[kybin]

Ah, I didn't catch that..

I still think it's needs more clarification. (for non-english users?) But that purely depends on go-team's decision.

Thank you for letting me know. @lstokeworth