Otherwise deleting a sheet that shifts the position of the pivot table
would turn the named range into the raw range that the name references.

getFontFaceNumber returns the index of the font in the collection,
font formats without indexes are now "0" rather than -1. All
existing code already converted < 0 to 0 anyway, so simplifys a
little.

Cell input in testDataPilotLabels() like 1.2.3 was prefixed with single
quote / apostrophe to not form a date input but string instead. With the
new date acceptance, in en-US locale 1.2.3 isn't a date anymore and the
quote becomes part of the cell content, so the test checking for 1.2.3
failed because the result was '1.2.3

Get rid of the lax "any 1-2 possible date separators used with 2-3 numbers
forms a date" date recognition. Use locale data's DateAcceptancePattern
elements to match against, or ISO 8601 yyyy-mm-dd, or an already applied date
format.

Special special.. upper and lower case letter GHE and space and non-breaking
space.

though I strongly doubt the entire US-centric approach ...