De-slop: remove every em-dash + banned words across all modules + capstone (#94)

Co-authored-by: claude <claude@jpaul.io>
Co-committed-by: claude <claude@jpaul.io>

modules/14-continuous-integration/lab/gitlab-ci-starter.yml

@@ -1,7 +1,7 @@
 # The SAME pipeline as ci-starter.yml, written for GitLab CI instead of GitHub Actions.
 #
 # The point of having both side by side: CI is a concept, not a product. Checkout, set up the
-# language, install tools, lint, test — every forge does these. Only the YAML dialect and the
+# language, install tools, lint, test: every forge does these. Only the YAML dialect and the
 # magic filename differ.
 #
 # Where this file goes: GitLab reads a single file named .gitlab-ci.yml at the repo root. Copy this
@@ -13,10 +13,10 @@ stages:
 
 check:
   stage: check
-  # The runner image — a throwaway container with Python already installed. The GitLab equivalent
+  # The runner image: a throwaway container with Python already installed. The GitLab equivalent
   # of "runs-on: ubuntu-latest" plus "set up Python".
   image: python:3.12
   script:
     - pip install ruff
     - ruff check .          # lint
-    - python -m unittest    # test (stdlib runner from Module 13 — nothing to install)
+    - python -m unittest    # test (stdlib runner from Module 13; nothing to install)