patch 8.2.1961: various comments can be improved
Problem: Various comments can be improved.
Solution: Various comment adjustments.
diff --git a/src/structs.h b/src/structs.h
index 007aa9d..330bb53 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1688,7 +1688,8 @@
#ifdef FEAT_PROFILE
proftime_T prof_child; // time spent in a child
#endif
- funccall_T *caller; // calling function or NULL
+ funccall_T *caller; // calling function or NULL; or next funccal in
+ // list pointed to by previous_funccal.
// for closure
int fc_refcount; // number of user functions that reference this