searching file A for any and all whitespace/tabs/commas then replacing these occurances with commas
That doesn't sound right to me! You're going to replace all the commas with commas?
What if your file looks like:
foo[tab]bar[tab]baz
foo[tab]bar, or possibly baz[tab]quux
You need to enclose the second item in the second line in quotes:
foo,bar,baz
foo,"bar, or possibly baz",quux
or else your data isn't going to be right.
($_='kkvvttuu bbooppuuiiffss qqffssmm iibbddllffss')
=~y~b-v~a-z~s; print
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