Issues in N-Triples files and a note on git tags

[kouralex]

Whilst working on the RDA Registry dataset, I encountered the following (minor) issues:

1. nt/Maps/mapUnc2MRC.nt has no newline at end of file. This causes trouble when concatenating multiple N-Triples files.
2. Both https://github.com/RDARegistry/RDA-Vocabularies/blob/master/xml/termList/RDAPolarity.xml and https://github.com/RDARegistry/RDA-Vocabularies/blob/master/nt/termList/RDAPolarity.nt have three (3) occasions where there exists a predicate of form <notation_0__et>. I only noticed this because some program I used had trouble accepting them (although strictly speaking they seem to be ok syntax-wise). It seems to me that these are redundant anyway as there already exists a proper skos:notation denoting the notation.

Additionally, I have noticed that the tagged version does not always match the expected commit. E.g., https://github.com/RDARegistry/RDA-Vocabularies/releases/tag/v5.1.0 does not incorporate 0979c91 even though on the RDA Registry website it clearly did as the values from the aforementioned commit appeared there (that is, before the release of version 5.1.1). This causes confusion and trouble.