Address comments from pull request
Address comments from pull request

The following minor changes took place
    - print -> parser.error, when there's a problem replacing the
      magnified figure with the non-magnified figure.
    - re-indent a line that did not have the proper indentation.

EmbrietteH/American-Gut,JWDebelius/American-Gut,JWDebelius/American-Gut,mortonjt/American-Gut,biocore/American-Gut,biocore/American-Gut,EmbrietteH/American-Gut,cuttlefishh/American-Gut,wasade/American-Gut,wasade/American-Gut