Misc release process update

A few of those things failed during release time, as I was building docs
on 3.10 (not 3.11) after recently upgrading.

IPython/core/completer.py

@@ -256,7 +256,7 b' except ImportError:'
     JEDI_INSTALLED = False
 
 
-if TYPE_CHECKING or GENERATING_DOCUMENTATION:
+if TYPE_CHECKING or GENERATING_DOCUMENTATION and sys.version_info >= (3, 11):
     from typing import cast
     from typing_extensions import TypedDict, NotRequired, Protocol, TypeAlias, TypeGuard
 else:

tools/release_helper.sh

@@ -2,15 +2,6 b''
 # when releasing with bash, simple source it to get asked questions. 
 
 # misc check before starting
-
-python -c 'import keyring'
-python -c 'import twine'
-python -c 'import sphinx'
-python -c 'import sphinx_rtd_theme'
-python -c 'import pytest'
-python -c 'import build'
-
-
 BLACK=$(tput setaf 1)
 RED=$(tput setaf 1)
 GREEN=$(tput setaf 2)
@@ -22,6 +13,22 b' WHITE=$(tput setaf 7)'
 NOR=$(tput sgr0)
 
 
+echo "Checking all tools are installed..."
+
+python -c 'import keyring'
+python -c 'import twine'
+python -c 'import sphinx'
+python -c 'import sphinx_rtd_theme'
+python -c 'import pytest'
+python -c 'import build'
+# those are necessary fo building the docs
+echo "Checking imports for docs"
+python -c 'import numpy'
+python -c 'import matplotlib'
+
+
+
+
 echo "Will use $BLUE'$EDITOR'$NOR to edit files when necessary"
 echo -n "PREV_RELEASE (X.y.z) [$PREV_RELEASE]: "
 read input