[Freeciv-Dev] (PR#12651) patch: better sorting in the city report

["Benoit Hudson" <bh@xxxxxxxxxxxxxxxxxxx>]

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=12651 >

Sorting in the city report is annoying for the multi-part fields; this
patch fixes that.  Now, strings (like the city name) are sorted as strings,
numbers (like gold, pollution, etc) are sorted as numbers, and
%d/%d/%d (like Surplus F/P/T) is sorted lexicographically as three numbers
rather than alphabetically, and so on.

cityreport-sort-correctly.diff
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