This reverts commit cb67fef24490571179c533b6bda2ede5c27385e5.

production is epsilon and is inlined in front.
With this change, %inline seems to preserve positions!

This allows us not to worry about the order of the printing side effects.

Now supported by the table back-end.

Only in internal form, for now -- does not exist in concrete syntax.
Not yet supported by the back-ends.

Cleanup in [NonTerminalDefinitionInlining], and the beginning of a new way of translating positions when %inlining. Unfinished.

and [rename_sw_inner] to [Nonterminaldefinitioninlining], where they
belong.

$startpos(x) in the callee if the callee itself happened to be called x.

Because no keyword appears twice in a set of keywords.

It passes.
This will allow some serious simplification.

This has to do with 1- updated locations produced by Menhir's bootstrapped
parser; and 2- the cleanup in [Action] re-orders some bindings for the
position keywords.