Add syntax highlighting for code/command blocks in README.

README.rst

@@ -32,26 +32,34 @@ This library provides a data structure and methods that make it possible to work
 
 Installation and Usage
 ----------------------
-This library is available as a `package on PyPI <https://pypi.org/project/exclusive>`__::
+This library is available as a `package on PyPI <https://pypi.org/project/exclusive>`__:
+
+.. code-block:: bash
 
     python -m pip install exclusive
 
-The library can be imported in the usual ways::
+The library can be imported in the usual ways:
+
+.. code-block:: python
 
     import exclusive
     from exclusive import *
 
 Examples
 ^^^^^^^^
-This library makes it possible to concisely construct multiple XOR-based secret shares from a bytes-like object::
+This library makes it possible to concisely construct multiple XOR-based secret shares from a bytes-like object:
+
+.. code-block:: python
 
     >>> from exclusive import shares, xor
     >>> (a, b) = shares(bytes([1, 2, 3]))
     >>> (c, d) = shares(bytes([4, 5, 6]))
     >>> ((a ^ c) ^ (b ^ d)) == xor([bytes([1, 2, 3]), bytes([4, 5, 6])])
     True
 
-The number of shares can be specified explicitly (the default is two shares)::
+The number of shares can be specified explicitly (the default is two shares):
+
+.. code-block:: python
 
     >>> (r, s, t) = shares(bytes([1, 2, 3]), quantity=3)
 
@@ -61,20 +69,26 @@ The number of shares can be specified explicitly (the default is two shares)::
 .. |sum| replace:: ``sum``
 .. _sum: https://docs.python.org/3/library/functions.html#sum
 
-For convenience, an |xor|_ operator that is analogous to Python's built-in |sum|_ function is provided::
+For convenience, an |xor|_ operator that is analogous to Python's built-in |sum|_ function is provided:
+
+.. code-block:: python
 
     >>> xor([bytes([1, 2, 3]), bytes([4, 5, 6])]).hex()
     '050705
 
 .. |share| replace:: ``share``
 .. _share: https://exclusive.readthedocs.io/en/0.2.0/_source/exclusive.html#exclusive.exclusive.share
 
-The |share|_ class is derived from the |bytes|_ class. Thus, all methods, operators, and functions that operate on bytes-like objects are supported for |share|_ objects. The |xor|_ operator provided by the library relies on Python's `built-in exclusive or operator <https://docs.python.org/3/reference/expressions.html#binary-bitwise-operations>`__ and can be used for concise reconstruction of values from a collection of secret shares::
+The |share|_ class is derived from the |bytes|_ class. Thus, all methods, operators, and functions that operate on bytes-like objects are supported for |share|_ objects. The |xor|_ operator provided by the library relies on Python's `built-in exclusive or operator <https://docs.python.org/3/reference/expressions.html#binary-bitwise-operations>`__ and can be used for concise reconstruction of values from a collection of secret shares:
+
+.. code-block:: python
 
     >>> xor([r, s, t]) == bytes([1, 2, 3])
     True
 
-In addition, conversion methods for Base64 strings are included to support encoding and decoding of |share|_ objects::
+In addition, conversion methods for Base64 strings are included to support encoding and decoding of |share|_ objects:
+
+.. code-block:: python
 
     >>> share.from_base64('HgEA').hex()
     '1e0100'
@@ -83,30 +97,40 @@ In addition, conversion methods for Base64 strings are included to support encod
 
 Development
 -----------
-All installation and development dependencies are fully specified in ``pyproject.toml``. The ``project.optional-dependencies`` object is used to `specify optional requirements <https://peps.python.org/pep-0621>`__ for various development tasks. This makes it possible to specify additional options (such as ``docs``, ``lint``, and so on) when performing installation using `pip <https://pypi.org/project/pip>`__::
+All installation and development dependencies are fully specified in ``pyproject.toml``. The ``project.optional-dependencies`` object is used to `specify optional requirements <https://peps.python.org/pep-0621>`__ for various development tasks. This makes it possible to specify additional options (such as ``docs``, ``lint``, and so on) when performing installation using `pip <https://pypi.org/project/pip>`__:
+
+.. code-block:: bash
 
     python -m pip install .[docs,lint]
 
 Documentation
 ^^^^^^^^^^^^^
-The documentation can be generated automatically from the source files using `Sphinx <https://www.sphinx-doc.org>`__::
+The documentation can be generated automatically from the source files using `Sphinx <https://www.sphinx-doc.org>`__:
+
+.. code-block:: bash
 
     python -m pip install .[docs]
     cd docs
     sphinx-apidoc -f -E --templatedir=_templates -o _source .. && make html
 
 Testing and Conventions
 ^^^^^^^^^^^^^^^^^^^^^^^
-All unit tests are executed and their coverage is measured when using `pytest <https://docs.pytest.org>`__ (see the ``pyproject.toml`` file for configuration details)::
+All unit tests are executed and their coverage is measured when using `pytest <https://docs.pytest.org>`__ (see the ``pyproject.toml`` file for configuration details):
+
+.. code-block:: bash
 
     python -m pip install .[test]
     python -m pytest
 
-Alternatively, all unit tests are included in the module itself and can be executed using `doctest <https://docs.python.org/3/library/doctest.html>`__::
+Alternatively, all unit tests are included in the module itself and can be executed using `doctest <https://docs.python.org/3/library/doctest.html>`__:
+
+.. code-block:: bash
 
     python src/exclusive/exclusive.py -v
 
-Style conventions are enforced using `Pylint <https://pylint.readthedocs.io>`__::
+Style conventions are enforced using `Pylint <https://pylint.readthedocs.io>`__:
+
+.. code-block:: bash
 
     python -m pip install .[lint]
     python -m pylint src/exclusive
@@ -121,20 +145,28 @@ The version number format for this library and the changes to the library associ
 
 Publishing
 ^^^^^^^^^^
-This library can be published as a `package on PyPI <https://pypi.org/project/exclusive>`__ by a package maintainer. First, install the dependencies required for packaging and publishing::
+This library can be published as a `package on PyPI <https://pypi.org/project/exclusive>`__ by a package maintainer. First, install the dependencies required for packaging and publishing:
+
+.. code-block:: bash
 
     python -m pip install .[publish]
 
-Ensure that the correct version number appears in ``pyproject.toml``, and that any links in this README document to the Read the Docs documentation of this package (or its dependencies) have appropriate version numbers. Also ensure that the Read the Docs project for this library has an `automation rule <https://docs.readthedocs.io/en/stable/automation-rules.html>`__ that activates and sets as the default all tagged versions. Create and push a tag for this version (replacing ``?.?.?`` with the version number)::
+Ensure that the correct version number appears in ``pyproject.toml``, and that any links in this README document to the Read the Docs documentation of this package (or its dependencies) have appropriate version numbers. Also ensure that the Read the Docs project for this library has an `automation rule <https://docs.readthedocs.io/en/stable/automation-rules.html>`__ that activates and sets as the default all tagged versions. Create and push a tag for this version (replacing ``?.?.?`` with the version number):
+
+.. code-block:: bash
 
     git tag ?.?.?
     git push origin ?.?.?
 
-Remove any old build/distribution files. Then, package the source into a distribution archive::
+Remove any old build/distribution files. Then, package the source into a distribution archive:
+
+.. code-block:: bash
 
     rm -rf build dist src/*.egg-info
     python -m build --sdist --wheel .
 
-Finally, upload the package distribution archive to `PyPI <https://pypi.org>`__::
+Finally, upload the package distribution archive to `PyPI <https://pypi.org>`__:
+
+.. code-block:: bash
 
     python -m twine upload dist/*