autosetup in prep section needs p1 flag added.

[fuzzball81]

If a spec file contains autosetup in the prep section, the -p1 flag needs to be appended to allow git formatted patches to be applied.

[yazug]

if using rdopkg patch to add patches and the following modification is required to make patches apply

-%autosetup -n %{pypi_name}-%{upstream_version}
+%autosetup -n %{pypi_name}-%{upstream_version} -p1

if -S git is present -p1 is not needed

[yac]

There are currently sanity checks that fail rdopkg patch/new-version on certain .spec errors, see
specfile.sanity_check.

So adding sanity_check_autosetup there would be simplest way to prevent this error without touching the .spec too much.

In order for automated fixing of stuff, some work on a streamlined and reausable solution is needed as described in #115.