hamming: normalize error messages (#1783)
hamming: normalize error messages (#1783)

I relased that #1762 does not normalize the error messages, it just makes them the same

Additionally, took the opportunity to normalize descriptions to use first strand/second strand, rather than a mix of that and left strand/right strand
jmluy/x-common,petertseng/x-common,petertseng/x-common,jmluy/x-common,exercism/x-common,jmluy/x-common,exercism/x-common