Applying one of a series of patches submitted by Frédéric Brière,

correcting Cities.dat data for Canada.

Frédéric wrote:

"Removed duplicate entries for Ottawa, ON, Canada

The two Ottawa entries are clearly duplicates; I removed the one most
distant from the official coordinates.

There is no official location named River Ottawa; while the city of
Ottawa sits on the river of the same name, that river is several hundred
kilometers long and does not warrant an arbitrary entry."

Note: I also verified that River Ottawa is not an official observing
      site of any astronomy association.

CCBUG: 270810