Terminals and non-terminals still need to be quoted, which is a
side-effect of using the Erlang scanner.

Notice that macro names are unquoted atoms.

See https://bugs.erlang.org/browse/ERL-263

The fix in commit c9bc5c94 of PR-431
(https://github.com/erlang/otp/pull/431) introduced new problems.

The 'dfa_graph' option did not work with Unicode.

The testcase 'unicode' was not correct.

When using Yecc's operator precedence declarations (Right, Nonassoc,
Left), it is possible that some clauses of the generated code are
unreachable. Dialyzer complains, at least if SET_LIMIT in erl_types is
set sufficiently high (to avoid sets of integers to collapse to the
integer() type). Rather than trying to figure out exactly which
clauses are unreachable, Yecc generates a Dialyzer suppression.

Since no test suites includede test_server.hrl, there is no need
to have test_server in the include path or code path.

As a first step to removing the test_server application as
as its own separate application, change the inclusion of
test_server.hrl to an inclusion of ct.hrl and remove the
inclusion of test_server_line.hrl.