Exercise 2: Rename Every Occurrence — Possible Solution
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EXAMPLE FILE
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let userCount = 0;
userCount = userCount + 1;
console.log(userCount);

STEPS
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1. Double-click the word "userCount" anywhere in the file to select
   one occurrence of it.
2. Press Ctrl+Shift+L (Cmd+Shift+L on macOS). Every occurrence of
   "userCount" in the file is selected simultaneously (3 occurrences
   in this example), each with its own cursor.
3. Type the replacement name, e.g. "totalUsers" — all 3 occurrences
   are renamed at once, in a single typed action:

let totalUsers = 0;
totalUsers = totalUsers + 1;
console.log(totalUsers);

4. Press Escape to collapse back to a single cursor.

WHY THIS WORKS AS AN ANSWER
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Ctrl+Shift+L reuses the chapter's own described behavior exactly —
unlike Ctrl+D (which adds occurrences one at a time, requiring one
keypress per match), Ctrl+Shift+L jumps straight to selecting EVERY
occurrence in the file in a single keystroke, which the chapter
specifically calls out as the faster option once you know you want
all matches rather than a chosen subset.

This exercise is a genuinely realistic use case rather than an
artificial one — renaming a variable used in several places is one of
the most common editing tasks in real code, and doing it with a single
multi-select-then-type action avoids the error-prone alternative of
manually editing each occurrence separately (and potentially missing
one).