Adapt to "exc_info" changes in CPython 3.11a4, where "->exc_type" and "->exc_traceback" are gone and now get inferred from "->exc_value".

Closes https://github.com/cython/cython/issues/4500

Cython incorrectly generated (optimised) range code for "for i in range(1,2,3,4)" as if it saw "for i in range(1,2,3)".
This PR deactivates this optimization when too many arguments are provided, to match the behavior of Python.
Original patch by Max Bachmann.

Closes https://github.com/cython/cython/pull/4550

Remove outdated warning about OpenMP < 3.0. Even the now-EOL Docker images for manylinux2010 had that.

Closes https://github.com/cython/cython/issues/4574

Remove outdated warning about OpenMP < 3.0. Even the now-EOL Docker images for manylinux2010 had that.

Closes https://github.com/cython/cython/issues/4574

Make the test files that depend on "cythonarrayutil.pxi" compilable by themselves, without the search directory setup of the test runner.

Disable the "dotted names not allowed" warning for include files, which may contain arbitrary directory paths and not just plain module names.

Add a new command line option so that
$ cythonize -M foo.pyx
produces a file `foo.c.dep` with dependencies of foo.pyx, in addition to `foo.c`.
Try to write relative paths as much as possible.

Closes https://github.com/cython/cython/issues/1214

Avoid misleading the C code formatter into adding an additional indentation level due to excess opening braces.

Avoid misleading the C code formatter into adding an additional indentation level due to an excess opening brace.

Make it easier to report errors from srctree tests by adding the last output to the reported AssertionError.

appveyor: Prevent the compiled Cython modules from being picked up during the build already by first compiling them completely before putting them into the source tree. On fork()-less Windows, late starting build processes could otherwise end up with partially compiled source trees.

Make the pyximport-pyimport tests more robust by testing that the file is compiled instead of looking at the "__file__" attribute.

This reverts commit e9435cd9.

Cython incorrectly generated (optimised) range code for "for i in range(1,2,3,4)" as if it saw "for i in range(1,2,3)".
This PR deactivates this optimization when too many arguments are provided, to match the behavior of Python.
Original patch by Max Bachmann.

Closes https://github.com/cython/cython/pull/4550

Closes https://github.com/cython/cython/issues/2770

Add missing import in doctest when the module is compiled (and StringIO has become a global cdef variable).