Add syntax highlight to all shell code blocks (#9445)

CONTRIBUTING.md

@@ -53,7 +53,7 @@ On Linux and Mac OS, you will be able to run the full test suite on Python 3.8,
 To install the necessary requirements, run the following commands from a
 terminal window:
 
-```
+```bash
 $ python3 -m venv .venv
 $ source .venv/bin/activate
 (.venv)$ pip install -U pip
@@ -73,11 +73,11 @@ WSL, follow the Linux/Mac OS instructions above.
 If you do not wish to install WSL, run the following commands from a Windows
 terminal to install all non-pytype requirements:
 
-```
+```powershell
 > python -m venv .venv
-> ".venv/scripts/activate"
+> .venv\scripts\activate
 (.venv) > pip install -U pip
-(.venv) > pip install -r requirements-tests.txt
+(.venv) > pip install -r "requirements-tests.txt"
 ```
 
 ## Code formatting
@@ -93,10 +93,10 @@ right away and add a commit to your PR.
 That being said, if you *want* to run the checks locally when you commit,
 you're free to do so. Either run `pycln`, `black` and `isort` manually...
 
-```
-pycln --config=pyproject.toml .
-isort .
-black .
+```bash
+$ pycln --config=pyproject.toml .
+$ isort .
+$ black .
 ```
 
 ...Or install the pre-commit hooks: please refer to the
@@ -107,8 +107,8 @@ Our code is also linted using `flake8`, with plugins `flake8-pyi`,
 flake8 before filing a PR is not required. However, if you wish to run flake8
 locally, install the test dependencies as outlined above, and then run:
 
-```
-flake8 .
+```bash
+(.venv3)$ flake8 .
 ```
 
 ## Where to make changes
@@ -248,7 +248,7 @@ To get started, fork typeshed, clone your fork, and then
 You can then install the library with `pip` into the virtualenv and run the script,
 replacing `libraryname` with the name of the library below:
 
-```
+```bash
 (.venv3)$ pip install libraryname
 (.venv3)$ python3 scripts/create_baseline_stubs.py libraryname
 ```

tests/README.md

@@ -22,7 +22,7 @@ in the `CONTRIBUTING.md` document. In particular, we recommend running with Pyth
 ## Run all tests for a specific stub
 
 Run using:
-```
+```bash
 (.venv3)$ python3 scripts/runtests.py <stdlib-or-stubs>/<stub-to-test>
 ```
 
@@ -36,7 +36,7 @@ so: `stdlib/os` or `stubs/requests`.
 ## mypy\_test.py
 
 Run using:
-```
+```bash
 (.venv3)$ python3 tests/mypy_test.py
 ```
 
@@ -56,7 +56,7 @@ Note: this test cannot be run on Windows
 systems unless you are using Windows Subsystem for Linux.
 
 Run using:
-```
+```bash
 (.venv3)$ python3 tests/pytype_test.py
 ```
 
@@ -67,7 +67,7 @@ This test works similarly to `mypy_test.py`, except it uses `pytype`.
 This test requires [Node.js](https://nodejs.org) to be installed. Although
 typeshed runs pyright in CI, it does not currently use this script. However,
 this script uses the same pyright version and configuration as the CI.
-```
+```bash
 (.venv3)$ python3 tests/pyright_test.py                                # Check all files
 (.venv3)$ python3 tests/pyright_test.py stdlib/sys.pyi                 # Check one file
 (.venv3)$ python3 tests/pyright_test.py -p pyrightconfig.stricter.json # Check with the stricter config.
@@ -88,14 +88,14 @@ for information on the various configuration options.
 ## check\_consistent.py
 
 Run using:
-```
-python3 tests/check_consistent.py
+```bash
+$ python3 tests/check_consistent.py
 ```
 
 ## stubtest\_stdlib.py
 
 Run using
-```
+```bash
 (.venv3)$ python3 tests/stubtest_stdlib.py
 ```
 
@@ -124,7 +124,7 @@ this script locally if you know you can trust the packages you're running
 stubtest on.
 
 Run using
-```
+```bash
 (.venv3)$ python3 tests/stubtest_third_party.py
 ```
 
@@ -132,13 +132,13 @@ Similar to `stubtest_stdlib.py`, but tests the third party stubs. By default,
 it checks all third-party stubs, but you can provide the distributions to
 check on the command line:
 
-```
+```bash
 (.venv3)$ python3 tests/stubtest_third_party.py Pillow toml  # check stubs/Pillow and stubs/toml
 ```
 
 If you have the runtime package installed in your local virtual environment, you can also run stubtest
 directly, with
-```
+```bash
 (.venv3)$ MYPYPATH=<path-to-module-stubs> python3 -m mypy.stubtest \
   --custom-typeshed-dir <path-to-typeshed> \
   <third-party-module>
@@ -173,7 +173,7 @@ for missing objects rather than trying to match the runtime in every detail.
 ## typecheck\_typeshed.py
 
 Run using
-```
+```bash
 (.venv3)$ python3 tests/typecheck_typeshed.py
 ```