Small fixes to episode 7

[abostroem]

• One of the solution cells had two different python cells which made the output confusing to read. This joins those two cells
• Adds key to to_hdf to remove future warning (in two places)
• Makes Latex labels raw strings to remove warning (in two places)
• Add type to match output

[github-actions]

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 md5sum.txt  |  2 +-
 2 files changed, 8 insertions(+), 10 deletions(-)

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⏱️ Updated at 2025-12-11 18:20:19 +0000