dev-python/backrefs: Bump to 5.1

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/backrefs/Manifest

@@ -1 +1,2 @@
 DIST backrefs-5.0.1.tar.gz 4120179 BLAKE2B 2cd8fb84c7e416be330cb9afdb894f6f8574b66698acc1d63abae8ff5bfcccd4bf29b724dcf2a25a637ea0fde46865b18a5ff1bfbff955a01798037752dc3d97 SHA512 e2212bd7dce017308fa558ccfe7faf617ed6107523db8b2e4a3ad7b60aa1d7aabdaea2632abd6a3f1f022eac949d7036a7afe522b5f086ef1888a0e67e834894
+DIST backrefs-5.1.tar.gz 5216647 BLAKE2B 060d153f0d5d674e7b2e6f744a9b283d10f9f47fb355fe5d5703cd83b2507852d606d51cdefcf37617ee12f7bc71d487bc50254763415c02422524da9d71aae6 SHA512 b5123e46f0bf2108060c7e4f350538159c08ee7fe3b07bbed44aaadc0481047262af80b7bf08066db423a86b4e8660a91c9e03ea41a7bb039c3d17ae3faa81fd

dev-python/backrefs/backrefs-5.1.ebuild

@@ -0,0 +1,50 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{8..10} )
+
+DOCS_BUILDER="mkdocs"
+DOCS_DEPEND="
+	dev-python/mkdocs-git-revision-date-localized-plugin
+	~dev-python/mkdocs_pymdownx_material_extras-1.0.7
+	dev-python/mkdocs-minify-plugin
+	dev-python/mkdocs-material
+	dev-python/pyspelling
+"
+
+inherit distutils-r1 docs
+
+DESCRIPTION="Wrapper around re or regex that adds additional back references"
+HOMEPAGE="
+	https://github.com/facelessuser/backrefs/
+	https://pypi.org/project/backrefs/
+"
+SRC_URI="https://github.com/facelessuser/${PN}/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~riscv ~x86"
+
+BDEPEND="
+	test? (
+		dev-python/mock[${PYTHON_USEDEP}]
+		dev-python/regex[${PYTHON_USEDEP}]
+		dev-vcs/git
+	)"
+
+distutils_enable_tests pytest
+
+python_prepare_all() {
+	# mkdocs-git-revision-date-localized-plugin needs git repo
+	if use doc; then
+		git init || die
+		git config --global user.email "you@example.com" || die
+		git config --global user.name "Your Name" || die
+		git add . || die
+		git commit -m 'init' || die
+	fi
+
+	distutils-r1_python_prepare_all
+}