A quick search turns up a serious-looking document
www.susandoreydesigns.com/software/IndexingAndWord.pdf
Quote:
\g "separators"
Specifies the characters (up to five) that separate a range of pages. Enclose the characters in quotation marks. The default is an en dash. The field {INDEX \g " to " } displays page ranges as "Finding text, 3 to 4"
|
At first glance, she doesn't seem to explain what arcane method Word uses to decide how close page numbers have to be to count as a range.