Fixed outdated example in reshape vignette

[venom1204]

closes #6524

This PR addresses the issue #6524

changes i made -

• Replaced Date Columns with Name Columns: In the example starting in Section 2, the dob_child columns have been replaced with name_child columns containing character data. This successfully re-introduces the character-integer conflict.
• Updated Example Output: The comment in the example's output now correctly states that the gender column is coerced to character, reflecting the restored behavior.
• Ensured Code Consistency: All subsequent code blocks that build upon this example have been updated to use the new name_child columns.

hi @MichaelChirico can you please have a look when you have time .
thanks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.50%. Comparing base (0e5f928) to head (7ffce5e).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7150   +/-   ##
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  Coverage   98.50%   98.50%           
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  Files          81       81           
  Lines       15032    15032           
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  Hits        14808    14808           
  Misses        224      224           

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[tdhock]

please use consistent indentation so data are easier to read.

[venom1204]

Thanks for pointing that out! I've updated the indentation for better readability.
Please take a look whenever you have a moment.
thanks.

[tdhock]

original text uses right justification for each column.
your text sometimes uses right (gender_child2) and sometimes left (name_child2).
please change left to right justification for consistency.

[tdhock]

please use a more informative and specific commit message than "Update datatable-reshape.Rmd"

please click Files Changed tab and ensure indentation / spacing / alignment is consistent before and after.

[venom1204]

Hi @tdhock,
A quick clarifying question: When I run the code locally, the printed data.table always looks aligned, which has been my point of confusion.
Just to confirm, is your feedback about the alignment of the text inside the string (i.e., s2) and not about how the data is printed after using fread().
If so, does this new version now meet the right-justification and alignment requirements?

[tdhock]

yes that is great thanks!