WIP

workshop/steps/01-vectors/README.md

@@ -9,13 +9,14 @@ A **vector** here is nothing mystical: a pair of numbers `(x, y)`. We use the
 same value to mean two different things depending on context:
 
 - a **position** — a point in the world.
-- a **displacement / velocity** — an arrow: "move this much in x, this much in y."
+- a **displacement / velocity** — an arrow: "move this much in x, this much in
+  y."
 
 That's it. All of 2D physics is built on adding, subtracting, and scaling these
 pairs.
 
 - `add(a, b)` → `(a.x + b.x, a.y + b.y)` — apply an arrow to a point.
-- `sub(a, b)` → `(a.x - b.x, a.y - b.y)` — the arrow that points *from b to a*.
+- `sub(a, b)` → `(a.x - b.x, a.y - b.y)` — the arrow that points _from b to a_.
 - `scale(a, s)` → `(a.x * s, a.y * s)` — make an arrow longer/shorter.
 
 > Note: we return **new** objects (pure functions) here for clarity. Your real