Fix regex matching run_test calls in ssl-opt.sh

No descriptions were processed before due to bugs in the regex.

Support \" inside double-quoted strings.
diff --git a/tests/scripts/check-test-cases.py b/tests/scripts/check-test-cases.py
index 688ad25..9e67a42 100755
--- a/tests/scripts/check-test-cases.py
+++ b/tests/scripts/check-test-cases.py
@@ -92,7 +92,7 @@
             # Assume that all run_test calls have the same simple form
             # with the test description entirely on the same line as the
             # function name.
-            m = re.match(r'\s+run_test\s+"([^"])"', line)
+            m = re.match(r'\s*run_test\s+"((?:[^\\"]|\\.)*)"', line)
             if not m:
                 continue
             description = m.group(1)