Add changeguard.

* Had to make all the README outputs reproducible.

.github/workflows/build-and-test.yml

@@ -27,14 +27,21 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: 3.8.0
-    - name: Install Bash (Ubuntu)
-      run: sudo apt-get update && sudo apt-get install -y bash grep xxd git xxhash rsync
+    - name: Install Bash and other dependencies (Ubuntu)
+      # * bash: scripts.
+      # * xxd: tests.
+      # * git: scripts, tests.
+      # * xxhash: changeguard.
+      # * rsync: out-of-directory test.
+      # * grep: tests.
+      # * expect: for `unbuffer`, useful to grab and compare ansi color symbols.
+      run: sudo apt-get update && sudo apt-get install -y bash grep xxd git xxhash rsync expect
     # - name: Install nvm
     #   run: |
     #     curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
     - name: Run everything
       run: |
         npm install
         npx playwright install-deps
-        npx playwright install
+        npx playwright install firefox
         bash scripts/pre.sh

.gitignore

@@ -1,7 +1,7 @@
 NOTES.md
 jsconfig.json
-.cache/
-node_modules/
+.cache
+node_modules
 screenshots/
 .deleteme/
 *.egg-info/

.pre-commit-config.yaml

@@ -24,6 +24,7 @@ repos:
   - id: name-tests-test
   - id: requirements-txt-fixer
   - id: trailing-whitespace
+    exclude: ^.*\.(svg|log)$
   - id: check-byte-order-marker
 - repo: https://github.com/jlebar/pre-commit-hooks
   rev: f2d115a052860b09b2888b4f104be614bf3b4779