clarify shutdown comment per suggestion from John

Author: Tom Reitz

lightbeam/lightbeam.py

@@ -129,15 +129,15 @@ def __init__(self, config_file, logger=None, selector="*", exclude="", keep_keys
             "resources": {}
         }
 
+    # this is intended to be called before any CRITICAL errors;
+    # any cleanup tasks should go here:
+    def shutdown(self, method):
+        self.write_structured_output(method)
+
     # helper function used below
     def replace_linebreaks(self, m):
         return re.sub(r"\s+", '', m.group(0))
 
-    def shutdown(self, method):
-        # this is called before any CRITICAL errors;
-        # any cleanup tasks should go here:
-        self.write_structured_output(method)
-
     def write_structured_output(self, command):
         ### Create structured output results_file if necessary
         self.end_timestamp = datetime.now()