native_concat: pass only strings to literal_eval

If there is only single node and it is not a string, there is no point
in passing it into ``literal_eval``, just return it immediately.

One of the examples where passing a non-string node into
``literal_eval`` would actually cause problems is when the node is
``Undefined``. On Python 3.10 this would cause ``UndefinedError``
instead of just ``Undefined`` being returned.

Fixes #1335

Fix "If" example in documentation (#1337)

Fix "If" example in documentation

add 'linetable' to the preserved CodeType attributes (#1334)

add 'linetable' to the preserved CodeType attributes

co_linetable replaces co_lnotab as part of PEP 626 in Python 3.10.

Merge pull request #1329 from pallets/dependabot/pip/pytest-6.2.1

Bump pytest from 6.1.2 to 6.2.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.1.2 to 6.2.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.1.2...6.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1330 from pallets/dependabot/pip/pre-commit-2.9.3

Bump pre-commit from 2.9.2 to 2.9.3

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.9.2 to 2.9.3.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.9.2...v2.9.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1328 from pallets/dependabot/pip/pip-tools-5.5.0

Bump pip-tools from 5.4.0 to 5.5.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.4.0 to 5.5.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.4.0...5.5.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Update templates.rst to fix small typo (#1327)

Merge pull request #1322 from pallets/dependabot/pip/pre-commit-2.9.2

Merge pull request #1321 from pallets/dependabot/pip/babel-2.9.0

Bump pre-commit from 2.8.2 to 2.9.2

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.8.2 to 2.9.2.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.8.2...v2.9.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1320 from pallets/dependabot/pip/pip-tools-5.4.0

Bump babel from 2.8.0 to 2.9.0

Bumps [babel](https://github.com/python-babel/babel) from 2.8.0 to 2.9.0.
- [Release notes](https://github.com/python-babel/babel/releases)
- [Changelog](https://github.com/python-babel/babel/blob/master/CHANGES)
- [Commits](https://github.com/python-babel/babel/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump pip-tools from 5.3.1 to 5.4.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.3.1...5.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

reduce lock schedule to daily

add lock threads workflow

Merge pull request #1306 from pallets/dependabot/pip/pre-commit-2.8.2

Bump pre-commit from 2.7.1 to 2.8.2

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.7.1 to 2.8.2.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.7.1...v2.8.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1307 from pallets/dependabot/pip/pytest-6.1.2

Bump pytest from 6.1.0 to 6.1.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.1.0 to 6.1.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.1.0...6.1.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1305 from pallets/dependabot/pip/tox-3.20.1

Bump tox from 3.20.0 to 3.20.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.20.0 to 3.20.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.20.0...3.20.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1303 from gibson042/gh-1279-custom-async-filters

Fix custom async filters

detect custom async filters in as_const

Merge pull request #1247 from MLH-Fellowship/type-hints

Setup mypy

Merge pull request #1296 from pallets/dependabot/pip/pytest-6.1.0

Bump pytest from 6.0.2 to 6.1.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.0.2 to 6.1.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.0.2...6.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1292 from pallets/dependabot/pip/pytest-6.0.2

Bump pytest from 6.0.1 to 6.0.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.0.1 to 6.0.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.0.1...6.0.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1291 from pallets/dependabot/pip/tox-3.20.0

Bump tox from 3.19.0 to 3.20.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.19.0 to 3.20.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.19.0...3.20.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Add GitHub templates from Werkzeug (#1282)

Merge pull request #1281 from pallets/dependabot/pip/pre-commit-2.7.1

Bump pre-commit from 2.6.0 to 2.7.1

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.6.0 to 2.7.1.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.6.0...v2.7.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1277 from pallets/dependabot/pip/tox-3.19.0

Bump tox from 3.18.1 to 3.19.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.18.1 to 3.19.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.18.1...3.19.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1274 from pallets/dependabot/pip/pip-tools-5.3.1

Bump pip-tools from 5.3.0 to 5.3.1

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.3.0 to 5.3.1.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.3.0...5.3.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1271 from pallets/dependabot/pip/pytest-6.0.1

Bump pytest from 6.0.0 to 6.0.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.0.0 to 6.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/6.0.0...6.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1268 from pallets/dependabot/pip/tox-3.18.1

Bump tox from 3.18.0 to 3.18.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.18.0 to 3.18.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.18.0...3.18.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1267 from pallets/dependabot/pip/pytest-6.0.0

Bump pytest from 5.4.3 to 6.0.0

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 to 6.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.4.3...6.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Setup mypy
* Add missing type hints (these are intended as an initial set of type hints, to be added upon and improved later)
* Setup MyPy to run as a Github Action

Merge pull request #1266 from pallets/dependabot/pip/pip-tools-5.3.0

Bump pip-tools from 5.2.1 to 5.3.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.2.1 to 5.3.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.2.1...5.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1263 from pallets/dependabot/pip/tox-3.18.0

Bump tox from 3.17.1 to 3.18.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.17.1 to 3.18.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.17.1...3.18.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1260 from pallets/dependabot/pip/tox-3.17.1

Bump tox from 3.17.0 to 3.17.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.17.0 to 3.17.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.17.0...3.17.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1259 from pallets/dependabot/pip/tox-3.17.0

Bump tox from 3.16.1 to 3.17.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.16.1 to 3.17.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/3.17.0/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.16.1...3.17.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1254 from pallets/dependabot/pip/pre-commit-2.6.0

Bump pre-commit from 2.5.1 to 2.6.0

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.5.1...v2.6.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

move metadata to setup.cfg

Merge pull request #1251 from pallets/dependabot/pip/tox-3.16.1

Bump tox from 3.16.0 to 3.16.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.16.0 to 3.16.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.16.0...3.16.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1250 from pallets/dependabot/pip/tox-3.16.0

Bump tox from 3.15.2 to 3.16.0

Bumps [tox](https://github.com/tox-dev/tox) from 3.15.2 to 3.16.0.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.15.2...3.16.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1240 from MLH-Fellowship/ignore-trim-blocks

Allow +%} to ignore trim_blocks

ignore trim_blocks using '+%}'

Merge pull request #1241 from MLH-Fellowship/macros_with_globals

Fix bug with imported macros and template globals

imported templates can see the current globals

_get_default_module takes an optional context to indicate that the
template is imported. If there are differences between the environment
and rendered template globals, a new module is used for the imported
template.

add more tests for import context behavior

Merge pull request #1238 from MLH-Fellowship/1197-sandbox

Remove sandbox Python < 3.5 compat

remove sandbox._MagicFormatMapping

add test for escape formatter

add contributing guide

Merge pull request #1232 from pallets/dependabot/pip/pre-commit-2.5.1

Bump pre-commit from 2.5.0 to 2.5.1

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.5.0...v2.5.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1231 from pallets/dependabot/pip/pip-tools-5.2.1

Bump pip-tools from 5.2.0 to 5.2.1

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.2.0 to 5.2.1.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.2.0...5.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1230 from pallets/dependabot/pip/pre-commit-2.5.0

Bump pre-commit from 2.4.0 to 2.5.0

Bumps [pre-commit](https://github.com/pre-commit/pre-commit) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/pre-commit/pre-commit/compare/v2.4.0...v2.5.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1229 from pallets/dependabot/pip/tox-3.15.2

Bump tox from 3.15.1 to 3.15.2

Bumps [tox](https://github.com/tox-dev/tox) from 3.15.1 to 3.15.2.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.15.1...3.15.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1228 from pallets/dependabot/pip/pytest-5.4.3

Bump pytest from 5.4.2 to 5.4.3

Bump pytest from 5.4.2 to 5.4.3

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.2 to 5.4.3.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/5.4.2...5.4.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump pip-tools from 5.1.2 to 5.2.0 (#1227)

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 5.1.2 to 5.2.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/5.1.2...5.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

add EditorConfig

Merge pull request #1225 from pallets/github-actions

use GitHub Actions for CI

use GitHub Actions for CI

Merge pull request #1224 from pallets/loader-docs

update package and filesystem loader docs

update package and filesystem loader docs

Merge pull request #1222 from pallets/dependabot/pip/tox-3.15.1

Bump tox from 3.15.0 to 3.15.1

Bump tox from 3.15.0 to 3.15.1

Bumps [tox](https://github.com/tox-dev/tox) from 3.15.0 to 3.15.1.
- [Release notes](https://github.com/tox-dev/tox/releases)
- [Changelog](https://github.com/tox-dev/tox/blob/master/docs/changelog.rst)
- [Commits](https://github.com/tox-dev/tox/compare/3.15.0...3.15.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Merge pull request #1221 from pallets/remove-docs-dev

remove docs requirements from dev requirments

remove docs requirements from dev requirments

otherwise Sphinx will cause Jinja to be pinned

try another dependabot ignore pattern

try another dependabot ignore pattern

fix dependabot config syntax

Merge pull request #1216 from pallets/dependabot-config

try to make dependabot ignore editable line

try to make dependabot ignore editable line

Merge pull request #1214 from pallets/requirements

use pip-compile to pin dev requirements

use pip-compile to pin dev requirements

Merge pull request #1213 from pallets/rtd-config

add readthedocs config

add readthedocs config

Merge pull request #1196 from pallets/remove-vim

remove vim syntax file