Remove obsolete cruft from the specfile, follow the packaging guidelines

- spell Python in summary with capital P
 - use HTTPS URL
 - use %pypi_source
 - remove a note about Python 2 from the description, there is no Python 2
 - %python_provide is redundant and deprecated
 - the Obsoletes for python2-sqlalchemy is not needed
 - %pytest is shorter and tests the installed module
 - listing %{python3_sitearch}/* in %files is forbidden
 - move python3-sqlalchemy %package above python-doc to be able to reuse %{summary}

python-sqlalchemy.spec

@@ -20,11 +20,11 @@ Version:        1.4.39
 # cope with pre-release versions containing tildes
 %global srcversion %{lua: srcversion, num = rpm.expand("%{version}"):gsub("~", ""); print(srcversion);}
 Release:        2%{?dist}
-Summary:        Modular and flexible ORM library for python
+Summary:        Modular and flexible ORM library for Python
 
 License:        MIT
-URL:            http://www.sqlalchemy.org/
-Source0:        https://files.pythonhosted.org/packages/source/S/%{srcname}/%{srcname}-%{srcversion}.tar.gz
+URL:            https://www.sqlalchemy.org/
+Source0:        %{pypi_source %{srcname} %{srcversion}}
 
 BuildRequires:  gcc
 BuildRequires:  python3-devel >= 3.6
@@ -44,19 +44,8 @@ as you choose, determining relationships based on foreign keys or letting you
 define the join conditions explicitly, to bridge the gap between database and
 domain.
 
-This package includes the python 2 version of the module.
-
-%package doc
-Summary:        Documentation for SQLAlchemy
-BuildArch:      noarch
-
-%description doc
-Documentation for SQLAlchemy
-
 %package -n python3-sqlalchemy
-Summary:        Modular and flexible ORM library for python
-%{?python_provide:%python_provide python%{python3_pkgversion}-sqlalchemy}
-Obsoletes:      python2-sqlalchemy < 1.3.10-2
+Summary:        %{summary}
 
 %description -n python3-sqlalchemy
 SQLAlchemy is an Object Relational Mapper (ORM) that provides a flexible,
@@ -67,11 +56,16 @@ as you choose, determining relationships based on foreign keys or letting you
 define the join conditions explicitly, to bridge the gap between database and
 domain.
 
-This package includes the python 3 version of the module.
-
 # Subpackages to ensure dependencies enabling extra functionality
 %{?python_extras_subpkg:%python_extras_subpkg -n python3-sqlalchemy -i %{python3_sitearch}/*.egg-info %python_pkg_extras}
 
+%package doc
+Summary:        Documentation for SQLAlchemy
+BuildArch:      noarch
+
+%description doc
+Documentation for SQLAlchemy.
+
 
 %prep
 %setup -q -n %{srcname}-%{srcversion}
@@ -86,7 +80,7 @@ This package includes the python 3 version of the module.
 rm -rf doc/build
 
 %check
-PYTHONPATH=. %{__python3} -m pytest test \
+%pytest test \
 %if %{with xdist}
 --numprocesses=auto
 %endif
@@ -98,7 +92,8 @@ PYTHONPATH=. %{__python3} -m pytest test \
 %files -n python3-sqlalchemy
 %license LICENSE
 %doc README.rst
-%{python3_sitearch}/*
+%{python3_sitearch}/SQLAlchemy-*.egg-info/
+%{python3_sitearch}/sqlalchemy/
 
 %changelog
 * Fri Jul 22 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1.4.39-2