autotest: move to state outside when we leave log structure

No vertical whitespace allowed in the structures...

We concatenate all of the LogStructure files; without this we remain in
state_inside and try to parse every line in the concatenation as if it
were a log structure definition

Tools/autotest/common.py

@@ -1828,6 +1828,7 @@ class AutoTest(ABC):
                         continue
                     m = re.match(r"\s*{(.*)\\", line)
                     if m is None:
+                        state = state_outside
                         continue
                     partial_line = m.group(1)
                     linestate = linestate_within