Bash syntax highlighting in README

datasette-{{cookiecutter.hyphenated}}/README.md

@@ -10,25 +10,26 @@
 ## Installation
 
 Install this plugin in the same environment as Datasette.
-
-    datasette install datasette-{{ cookiecutter.hyphenated }}
-
+```bash
+datasette install datasette-{{ cookiecutter.hyphenated }}
+```
 ## Usage
 
 Usage instructions go here.
 
 ## Development
 
 To set up this plugin locally, first checkout the code. Then create a new virtual environment:
-
-    cd datasette-{{ cookiecutter.hyphenated }}
-    python3 -m venv venv
-    source venv/bin/activate
-
+```bash
+cd datasette-{{ cookiecutter.hyphenated }}
+python3 -m venv venv
+source venv/bin/activate
+```
 Now install the dependencies and test dependencies:
-
-    pip install -e '.[test]'
-
+```bash
+pip install -e '.[test]'
+```
 To run the tests:
-
-    pytest
+```bash
+pytest
+```