working memory exercise updates

[brownsarahm]

Motivated by changes by Trisha

• spaces will make copy-paste work better
• second change makes the 2nd time through the memory exercise more reflective

[github-actions]

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Rendered Changes

🔍 Inspect the changes: https://github.com/carpentries/instructor-training/compare/md-outputs..md-outputs-PR-2013

The following changes were observed in the rendered markdown documents:

 05-memory.md | 29 ++++++++++++++---------------
 md5sum.txt   |  2 +-
 2 files changed, 15 insertions(+), 16 deletions(-)

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⏱️ Updated at 2026-06-03 16:06:28 +0000