* tests/dynamic-scope.test, tests/eval.test,
tests/r5rs_pitfall.test, tests/srfi-17.test, tests/syncase.test:
Wrap tests in module (test-suite test-<file-name without .test>),
following a practice that was used on a couple of files already.
* tests/dynamic-scope.test (exception:duplicate-binding,
exception:bad-binding): New.
* tests/dynamic-scope.test, tests/srfi-17.test, tests/syntax.test:
Execute syntactically wrong tests using eval. With the upcoming
new memoizer this is necessary in order to postpone the syntax
check to the actual evaluation of the syntactically wrong form.
* tests/syntax.test: Added some test cases and modified one test
case.
