Review existing comments and add new ones

Also clarified a statement

whipper/extern/task/task.py

@@ -238,6 +238,7 @@ class Task(LogStub):
                 method = getattr(l, methodName)
                 try:
                     method(self, *args, **kwargs)
+                # FIXME: catching too general exception (Exception)
                 except Exception as e:
                     self.setException(e)
 
@@ -350,6 +351,7 @@ class BaseMultiTask(Task, ITaskListener):
             task.start(self.runner)
             self.debug('BaseMultiTask.next(): started task %d of %d: %r',
                        self._task, len(self.tasks), task)
+        # FIXME: catching too general exception (Exception)
         except Exception as e:
             self.setException(e)
             self.debug('Got exception during next: %r', self.exceptionMessage)
@@ -503,6 +505,7 @@ class SyncRunner(TaskRunner, ITaskListener):
         try:
             self.debug('start task %r' % task)
             task.start(self)
+        # FIXME: catching too general exception (Exception)
         except Exception as e:
             # getExceptionMessage uses global exception state that doesn't
             # hang around, so store the message