tests: Fixed a test name

The Reasoned Schemer tests for chapter 1 contained an "1.26" frame
twice. The second should have been "1.27", which is now corrected.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
adderall.dsl: Fix a variable leak in run*

To not leak the variable 's' in run*, use gensym in the outer let.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
tests/schemer/: Use the same LVar names as The Reasoned Schemer

Now that run* behaves similarly to how it does in the Reasoned Schemer,
we can finally use the same variable names in the tests.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>