cleanup: use extlinks

Author: skirpichev

peps/pep-0812.rst

@@ -96,19 +96,11 @@ Same affects addition (or subtraction):
 
 Simplistic approach for complex arithmetic is underlying reason for numerous
 and reccuring issues in the CPython bugtracker (here is an incomplete list:
-`#61538 <https://github.com/python/cpython/issues/61538>`_,
-`#66738 <https://github.com/python/cpython/issues/66738>`_,
-`#67418 <https://github.com/python/cpython/issues/67418>`_,
-`#69639 <https://github.com/python/cpython/issues/69639>`_,
-`#70026 <https://github.com/python/cpython/issues/70026>`_,
-`#71550 <https://github.com/python/cpython/issues/71550>`_,
-`#84450 <https://github.com/python/cpython/issues/84450>`_,
-`#85657 <https://github.com/python/cpython/issues/85657>`_,
-`#105027 <https://github.com/python/cpython/issues/105027>`_,
-`#107854 <https://github.com/python/cpython/issues/107854>`_,
-`#112176 <https://github.com/python/cpython/issues/112176>`_,
-`#122615 <https://github.com/python/cpython/issues/122615>`_)
-and mathematical libraries in the Python ecosystem (e.g. `numpy/numpy#26310
+:cpython-issue:`61538`, :cpython-issue:`66738`, :cpython-issue:`67418`,
+:cpython-issue:`69639`, :cpython-issue:`70026`, :cpython-issue:`71550`,
+:cpython-issue:`84450`, :cpython-issue:`85657`, :cpython-issue:`105027`,
+:cpython-issue:`107854`, :cpython-issue:`112176`, :cpython-issue:`122615`) and
+mathematical libraries in the Python ecosystem (e.g. `numpy/numpy#26310
 <https://github.com/numpy/numpy/issues/26310>`_ or `mpmath/mpmath#774
 <https://github.com/mpmath/mpmath/issues/774#issuecomment-2034375377>`_).
 Among others, broken ``repr(eval(repr(x))) == repr(x)`` invariant for complex
@@ -165,10 +157,9 @@ complex and real numbers costs only two real multiplications, not four).
 Though it's more important, that in the IEC floating-point arithmetic results
 here are uniquely determined by usual mathematical formulae.
 
-For a first step, `PR#124829 <https://github.com/python/cpython/pull/124829>`__
-added in the CPython 3.14 mixed-mode rules for complex arithmetic, combining
-real and complex operands.  So, examples like :eq:`ex-mul1` or :eq:`ex-add1`
-now are working correctly:
+For a first step, :cpython-pr:`124829` added in the CPython 3.14 mixed-mode
+rules for complex arithmetic, combining real and complex operands.  So,
+examples like :eq:`ex-mul1` or :eq:`ex-add1` now are working correctly:
 
 .. code:: pycon