For the 2 nd snapshot of caves and cliffs one or more copper blocks have a capital k at the end!

Put the summary of the bug you're having here

What I expected to happen was...:
That capital k was spotted in the end of the name of a copper block varient

 

 

 

 

Steps to Reproduce:
1. Look for the names with the capital k
2. rename the block
3. then update it in 20w47a