go/ast: better documentation for CallExpr node

Fixes #17222.

Change-Id: Iffffc8cbb8627d06afa9066246b68fa2da4600e3
Reviewed-on: https://go-review.googlesource.com/29810
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

diff --git a/src/go/ast/ast.go b/src/go/ast/ast.go
index d3dcd7915ba8ed099cdd98533e13add838ead51f..b6dc2a6c16fc3957aea3caef8930499019237913 100644 (file)
--- a/src/go/ast/ast.go
+++ b/src/go/ast/ast.go
@@ -317,7 +317,7 @@ type (
                Fun      Expr      // function expression
                Lparen   token.Pos // position of "("
                Args     []Expr    // function arguments; or nil
-               Ellipsis token.Pos // position of "...", if any
+               Ellipsis token.Pos // position of "..." (token.NoPos if there is no "...")
                Rparen   token.Pos // position of ")"
        }