app-doc/ford: add Python3.11 compat.

Signed-off-by: Sergey Torokhov <torokhov-s-a@yandex.ru>

app-doc/ford/files/ford-6.1.17_fix_python3.11_tests.patch

@@ -0,0 +1,22 @@
+From 67b1355fea6904dc8ea540a6cfaa6164dc3a1a23 Mon Sep 17 00:00:00 2001
+From: Peter Hill <peter.hill@york.ac.uk>
+Date: Tue, 24 Jan 2023 10:54:10 +0000
+Subject: [PATCH] Fix test for Python 3.11 (mutable default not allowed)
+
+---
+ test/test_sourceform.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/test/test_sourceform.py b/test/test_sourceform.py
+index 4e6c9d3..f3a67c9 100644
+--- a/test/test_sourceform.py
++++ b/test/test_sourceform.py
+@@ -790,7 +790,7 @@ class FakeParent:
+ class FakeVariable:
+     name: str
+     vartype: str
+-    parent: Optional[FakeParent] = FakeParent()
++    parent: Optional[FakeParent] = field(default_factory=FakeParent)
+     attribs: Optional[List[str]] = field(default_factory=list)
+     intent: str = ""
+     optional: bool = False

app-doc/ford/ford-6.1.17-r1.ebuild

@@ -0,0 +1,45 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+PYTHON_COMPAT=( python3_{9..11} )
+DISTUTILS_USE_PEP517=setuptools
+
+inherit distutils-r1 toolchain-funcs
+
+MY_PN="FORD"
+DESCRIPTION="FORD, automatic documentation generator for modern Fortran programs"
+HOMEPAGE="https://github.com/Fortran-FOSS-Programmers/ford"
+SRC_URI="mirror://pypi/${MY_PN:0:1}/${MY_PN}/${MY_PN}-${PV}.tar.gz"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+S="${WORKDIR}/${MY_PN}-${PV}"
+
+RDEPEND="
+	dev-python/beautifulsoup4[${PYTHON_USEDEP}]
+	>=dev-python/graphviz-0.20[${PYTHON_USEDEP}]
+	dev-python/jinja[${PYTHON_USEDEP}]
+	>=dev-python/markdown-3.4[${PYTHON_USEDEP}]
+	>=dev-python/markdown-include-0.7.0[${PYTHON_USEDEP}]
+	>=dev-python/pygments-2.12.0[${PYTHON_USEDEP}]
+	dev-python/python-markdown-math[${PYTHON_USEDEP}]
+	>=dev-python/tqdm-4.64.0[${PYTHON_USEDEP}]
+	>=dev-python/toposort-1.7[${PYTHON_USEDEP}]
+"
+DEPEND="${RDEPEND}"
+
+PATCHES=( "${FILESDIR}/${P}_fix_python3.11_tests.patch" )
+
+DOCS=( CHANGELOG.md README.md )
+
+distutils_enable_tests pytest
+
+src_prepare() {
+	default
+	sed -i -e 's/"cpp /"'"$(tc-getCPP)"' /' ford/__init__.py || die # bug: 839300
+}