Weird page range questions

[jgm]

In page_ChicagoWeird.txt the range n11564-1568 is supposed to be rendered as

Example U, at n11564-1568

(where - is ascii hyphen). Why is it this and not

Example U, at n11564[U+2013]68

In page_ExpandWeirdComposite.txt the page range 123N110 - N5, 456K200 - 99 is supposed to be rendered as:

123N110-N5, 456K200-99

(This just collapses spaces around the ascii hyphens, without turning them into en dashes or doing other substitutions.) Why is this the desired output and not

123N110[U+2013]N5, 456K200[U+2013]456K299