[two-bucket] Make valid moves clearer (#1644)
[two-bucket] Make valid moves clearer (#1644)

There has been confusion over the reuse of the word "one" in both the descriptions of the bucket ("Bucket one") and the moves ("Move from one bucket"). This removes that confusion, which will help reduce misunderstanding, especially amongst non-native English speakers.
jmluy/x-common,petertseng/x-common,jmluy/x-common,jmluy/x-common,petertseng/x-common,exercism/x-common,exercism/x-common