Check #4c mistakes normal words for elemental symbols

[osanstrong]

At the time of writing this issue (commit e8d3b63), the code for section 4c ("Elemental symbols should be capitalized, names should not") uses a basic (somewhat insecure) awk script to make one combined regex pattern for all elemental patterns.

This, expectedly, causes it to overzealously apply this capitalization to words that look like symbols, such as 'be' or 'in'.

(This implementation was quickly implemented to fit in a long pipe of sed commands, and therefore can and should be rewritten, since the script has been reorganized to no longer be one giant pipe.)

This issue can be resolved with a PR that replaces the implementation of 4c (and possibly other element-related edits) with a more thorough, multi-line approach, one which can take such false positives into account.