Typo fixes

[dc2917]

Closes #263

This PR fixes some typos throughout the course. Some of these were minor (missing punctuation) but some were more considerable, for instance:

• Exercises ask learners to perform operations on the string 'aluminum', while the solutions use 'aluminium'.
• A calculation to sum the positive values in an array stated the incorrect result (despite the function being correct)
• There was a reference to a variable 'filename', which should have been 'file_name'
• There was a reference to a variable 'output_range', which should have been 'overlap' - this caused assertions to fail
• References to line numbers have been updated
• end statements have been added to functions where missing

[github-actions]

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Rendered Changes

🔍 Inspect the changes: https://github.com/swcarpentry/matlab-novice-inflammation/compare/md-outputs..md-outputs-PR-264

The following changes were observed in the rendered markdown documents:

 02-arrays.md    |  2 +-
 03-plotting.md  |  2 +-
 04-scripts.md   |  2 +-
 05-loops.md     |  4 ++--
 06-cond.md      |  4 ++--
 08-defensive.md | 12 ++++++++----
 md5sum.txt      | 12 ++++++------
 7 files changed, 21 insertions(+), 17 deletions(-)

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⏱️ Updated at 2025-01-06 16:55:04 +0000