Update docs/docs/contributing/debugging.md

Co-Authored-By: Guillaume Martres <[email protected]>

Author: anatoliykmetyuk

docs/docs/contributing/debugging.md

@@ -198,7 +198,7 @@ You can then use these IDs to locate the creation site of a given tree using tha
 dotc -Ydebug-tree-with-id 1049 ../issues/Playground.scala
 ```
 
-When requested what you want to do:
+When the tree with the correspond id is allocated, the following prompt will appear:
 
 ```
 Debug tree (id=1049) creation