#456 Remove extra space between author names

[Ahasuerus]

There are extra spaces between author names on numerous ISFDB pages -- grep for displayAuthorById for a list of all occurrences. This is caused by the fact that the code that calls this function does it in a loop and prints a comma in between names, although the exact usage is inconsistent -- see fc.py for an example. It would be desirable to remove the extra space.

[Ahasuerus]

Implemented in:

biblio/biblio.py 1.80
biblio/common.py 1.169
biblio/fc.py 1.31
biblio/pl.py 1.102
biblio/top100.py 1.6
biblio/userver.py 1.10

Installed in r2017-045 on 2017-02-09. Closing.