Fix minor bugs and typos (#917)

* Fix code duplication in docs

* Fix typo in README (#916)

* Fix code duplication in docs (#912)

* Remove the extra underscore from the readme (#913)

* Bump pytest from 5.4.3 to 6.0.1 (#915)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 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](pytest-dev/pytest@5.4.3...6.0.1)

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

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

* Update README.rst

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

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

README.rst

@@ -46,7 +46,7 @@ The key features are:
 - **Extensibility**: You can create your own data providers and use them with Mimesis.
 - **Generic data provider**: The `simplified <https://mimesis.name/getting_started.html#generic-provider>`_ access to all the providers from a single object.
 - **Multilingual**: Supports data for `a lot of languages <https://mimesis.name/getting_started.html#locales>`_.
-- **Data variety**: Supports data for  `a lot of data providers <https://mimesis.name/api.html>`_ for a variety of proposes.
+- **Data variety**: Supports `a lot of data providers <https://mimesis.name/api.html>`_ for a variety of purposes.
 - **Schema-based generators**: Provides an easy mechanism to generate data by the schema of any complexity.
 - **Country-specific data providers**: Provides data specific only for `some countries <https://mimesis.name/api.html#builtin-data-providers>`_.