### What is your issue? ``contributing.rst`` contains a link to "the [testing page](https://github.com/pydata/xarray/wiki/Testing) of the wiki" that goes instead to the main github page for xarray. The broken link is: https://github.com/pydata/xarray/wiki/Testing Because of this, new contributors are unable to find information about "If your test requires working with files or network connectivity..."