+2021-04-24 Simon Marchi <simon.marchi@polymtl.ca>
+
+ * observable.h (observer_debug_printf,
+ OBSERVER_SCOPED_DEBUG_START_END): New.
+ (class observable) <notify, attach>: Use them.
+
2021-04-24 Simon Marchi <simon.marchi@polymtl.ca>
* common-debug.h (struct scoped_debug_start_end)