apache / commons-io / 279

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travis-ci

Fix broken build (#73)

Several things were broken with the build. This fixes build failures and
makes the build pass again on all Java versions tested on Travis CI.

1. The test started to fail after the changes made in b5990be. This is
   because after changing the type of writer from Appendable to NullWriter
   the wrong overload of copy would be used:

    copy(Reader, Writer) instead of copy(Reader, Appendable)

  This change just forces the right overload at the call site.

2. Replace tabs with spaces
3. Add missing package-info file
4. Fix NPE during javadoc generation

  Commons parent 46 shipped with maven-javadoc-plugin 3.0.0 which was
  affected by https://issues.apache.org/jira/browse/MJAVADOC-517.
  This upgrades the build to commons parent 47, which includes
  maven-javadoc-plugin 3.0.1.

5. Fix invalid javadoc links
6. Fix problem with Javadoc tool reporting import of unnamed modules

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