Vassilii Khachaturov:

Vassilii Khachaturov:

this patch eliminates some cut-and-paste,
as well as makes some frequently used strings const static at the same
time. A couple of interfaces are decorated with 'const' on the parameters
that are such, in line with other such interfaces where const is used.

"NINE" changed to "NINER", to match ICAO practice and the current FGFS
voice data.

A fixed buffer, sprintf and a warning comment replaced w/ostringstream.

Alex Romosan:

+string ConvertRwyNumToSpokenString(const string s) {

this should be string ConvertRwyNumToSpokenString(const string& s)
so we don't make unnecessary copies.