This strips the complete 20 bytes node which was not found. Having the the full
node in error message is important as it makes debugging easier.
If a short node is to be displayed, that should be done by callers.
+1 on this, such error don't happens on "normal" operation, they are mostly the result of store or cache corruption, or user error when using advanced debug command. So having as much information as possible available is a big plus.