author_names parser adds extra space to single initial first names

[tjacovich]

_normalize_author() method parses all non-whitespace characters as initials. In the case of single initial first names ie. "Stoudenmire, E. M." an extra space is added between the two initials in the normalized author name ie. “Stoudenmire, E  M”. This is due to the regex_author regex parsing the period as a separate initial which is then stripped from the final string.

[tjacovich]

It is also an issue for hyphenated names ie. "Last, First-Name" -> "Last, F -"