[Checkins] [zopefoundation/ExtensionClass] c4f4d5: Improve readability.

[Michael Howitz]

  Branch: refs/heads/drop-py2
  Home:   https://github.com/zopefoundation/ExtensionClass
  Commit: c4f4d53aa001ca5eaa72f07839ce62db5aa8058c
      https://github.com/zopefoundation/ExtensionClass/commit/c4f4d53aa001ca5eaa72f07839ce62db5aa8058c
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Improve readability.


  Commit: 74956180af658f209ef9b2bf5433ed99fa2a85d1
      https://github.com/zopefoundation/ExtensionClass/commit/74956180af658f209ef9b2bf5433ed99fa2a85d1
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Improve extras usage.


  Commit: bb1274cc6cb1a9323bbe2c6493d6a9ed82cc3ef3
      https://github.com/zopefoundation/ExtensionClass/commit/bb1274cc6cb1a9323bbe2c6493d6a9ed82cc3ef3
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M tox.ini

  Log Message:
  -----------
  Use tox factors.


  Commit: 99f974b530cf7c7fe84234a2a0136477e191a614
      https://github.com/zopefoundation/ExtensionClass/commit/99f974b530cf7c7fe84234a2a0136477e191a614
  Author: Michael Howitz <mh at gocept.com>
  Date:   2020-03-27 (Fri, 27 Mar 2020)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Use new syntax.


Compare: https://github.com/zopefoundation/ExtensionClass/compare/df69beb85b20...99f974b530cf