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/10-reviewing-code-you-didnt-write/README.md

@@ -1,4 +1,4 @@
-# Module 10 — Reviewing Code You Didn't Write
+# Module 10: Reviewing Code You Didn't Write
 
 > **The AI wrote a diff that reads beautifully and is wrong in one line you'll skim right past.**
 > Reviewing for *plausibility traps*, not just bugs, is a skill almost nobody teaches. This module
@@ -8,12 +8,12 @@
 
 ## Prerequisites
 
-- **Module 2 — Version Control as a Safety Net.** You read changes with `git diff`. This module
+- **Module 2: Version Control as a Safety Net.** You read changes with `git diff`. This module
   turns that one-off habit into a disciplined review pass over a whole change.
-- **Module 8 — Remotes and Hosting.** Your repo lives on a host now, and a change arrives as a
+- **Module 8: Remotes and Hosting.** Your repo lives on a host now, and a change arrives as a
   *pull request* (GitHub/Gitea/Forgejo) or *merge request* (GitLab): same thing, different name.
   We'll write "PR" throughout; it's the unit of review.
-- **Module 9 — Issues and the Task Layer** (helpful, not required). A PR usually answers an issue;
+- **Module 9: Issues and the Task Layer** (helpful, not required). A PR usually answers an issue;
   the issue is the "what I asked for" you review the diff against.
 
 If you only have Modules 1–2, you can still do the core skill of this module locally (reviewing a
@@ -205,7 +205,7 @@ real change, then review a diff the "AI" produced and catch the trap planted in
 - **Optional (Part A as a real PR):** the repo you pushed to a host in Module 8. If you don't have
   one, do Part A locally as a branch; the review skill in Parts B–C is identical either way.
 
-### Part A — Open a PR as a gate
+### Part A: Open a PR as a gate
 
 1. Have your agent set up the base app as a throwaway `review-lab` repo, then confirm the baseline
    behavior yourself. This `review-lab` is *separate* from the `tasks-app` you've built up across
@@ -251,7 +251,7 @@ real change, then review a diff the "AI" produced and catch the trap planted in
    automatic on a dangerous one. Once you've read it and it's exactly what you asked for, tell the
    agent to merge it into `main`.
 
-### Part B — Review the AI's diff (the real exercise)
+### Part B: Review the AI's diff (the real exercise)
 
 3. Now a teammate-who-is-an-AI has opened a PR. The prompt it was given was exactly:
    **"Add a `delete <index>` command to the tasks app."** The change is captured as a patch in the
@@ -279,7 +279,7 @@ real change, then review a diff the "AI" produced and catch the trap planted in
    that changes behavior you tested in Part A. Write down what you think the trap is *before*
    step 5.
 
-### Part C — Confirm the trap by running the failure case
+### Part C: Confirm the trap by running the failure case
 
 5. Now verify your read by running the *failure* path, not the happy one: