📝 Rename :pull: RST role to :pr:

This is a preparatory patch for integrating the third party
`sphinx-issues` extension.

Author: webknjaz

doc/en/announce/release-2.9.0.rst

@@ -45,7 +45,7 @@ The py.test Development Team
 **New Features**
 
 * New ``pytest.mark.skip`` mark, which unconditionally skips marked tests.
-  Thanks :user:`MichaelAquilina` for the complete PR (:pull:`1040`).
+  Thanks :user:`MichaelAquilina` for the complete PR (:pr:`1040`).
 
 * ``--doctest-glob`` may now be passed multiple times in the command-line.
   Thanks :user:`jab` and :user:`nicoddemus` for the PR.

doc/en/announce/release-2.9.1.rst

@@ -44,7 +44,7 @@ The py.test Development Team
   Thanks :user:`nicoddemus` for the PR.
 
 * Fix (:issue:`469`): junit parses report.nodeid incorrectly, when params IDs
-  contain ``::``. Thanks :user:`tomviner` for the PR (:pull:`1431`).
+  contain ``::``. Thanks :user:`tomviner` for the PR (:pr:`1431`).
 
 * Fix (:issue:`578`): SyntaxErrors
   containing non-ascii lines at the point of failure generated an internal

doc/en/announce/release-2.9.2.rst

@@ -44,14 +44,14 @@ The py.test Development Team
 
 * Fix Xfail does not work with condition keyword argument.
   Thanks :user:`astraw38` for reporting the issue (:issue:`1496`) and :user:`tomviner`
-  for PR the (:pull:`1524`).
+  for PR the (:pr:`1524`).
 
 * Fix win32 path issue when putting custom config file with absolute path
   in ``pytest.main("-c your_absolute_path")``.
 
 * Fix maximum recursion depth detection when raised error class is not aware
   of unicode/encoded bytes.
-  Thanks :user:`prusse-martin` for the PR (:pull:`1506`).
+  Thanks :user:`prusse-martin` for the PR (:pr:`1506`).
 
 * Fix ``pytest.mark.skip`` mark when used in strict mode.
   Thanks :user:`pquentin` for the PR and :user:`RonnyPfannschmidt` for