replace non-ascii characters in source code (#9143)

(cherry picked from commit 4b73b4a49f542e2e051da6ee50e54f7fe06a13b1)

src/FactSystem/FactMetaData.cc

@@ -61,17 +61,17 @@ const FactMetaData::AppSettingsTranslation_s FactMetaData::_rgAppSettingsTransla
     { "cm/px",  "cm/px",    FactMetaData::UnitHorizontalDistance,    UnitsSettings::HorizontalDistanceUnitsMeters, FactMetaData::_defaultTranslator,                   FactMetaData::_defaultTranslator },
     { "m/s",    "m/s",      FactMetaData::UnitSpeed,                 UnitsSettings::SpeedUnitsMetersPerSecond,     FactMetaData::_defaultTranslator,                   FactMetaData::_defaultTranslator },
     { "C",      "C",        FactMetaData::UnitTemperature,           UnitsSettings::TemperatureUnitsCelsius,       FactMetaData::_defaultTranslator,                   FactMetaData::_defaultTranslator },
-    { "m^2",    "m\u00B2",  FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareMeters,         FactMetaData::_defaultTranslator,                   FactMetaData::_defaultTranslator },
+    { "m^2",    "m^2",      FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareMeters,         FactMetaData::_defaultTranslator,                   FactMetaData::_defaultTranslator },
     { "m",      "ft",       FactMetaData::UnitHorizontalDistance,    UnitsSettings::HorizontalDistanceUnitsFeet,   FactMetaData::_metersToFeet,                        FactMetaData::_feetToMeters },
     { "meter",  "ft",       FactMetaData::UnitHorizontalDistance,    UnitsSettings::HorizontalDistanceUnitsFeet,   FactMetaData::_metersToFeet,                        FactMetaData::_feetToMeters },
     { "meters", "ft",       FactMetaData::UnitHorizontalDistance,    UnitsSettings::HorizontalDistanceUnitsFeet,   FactMetaData::_metersToFeet,                        FactMetaData::_feetToMeters },
     { "vertical m",  "ft",  FactMetaData::UnitVerticalDistance,      UnitsSettings::VerticalDistanceUnitsFeet,     FactMetaData::_metersToFeet,                        FactMetaData::_feetToMeters },
     { "cm/px",  "in/px",    FactMetaData::UnitHorizontalDistance,    UnitsSettings::HorizontalDistanceUnitsFeet,   FactMetaData::_centimetersToInches,                 FactMetaData::_inchesToCentimeters },
-    { "m^2",    "km\u00B2", FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareKilometers,     FactMetaData::_squareMetersToSquareKilometers,      FactMetaData::_squareKilometersToSquareMeters },
+    { "m^2",    "km^2",     FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareKilometers,     FactMetaData::_squareMetersToSquareKilometers,      FactMetaData::_squareKilometersToSquareMeters },
     { "m^2",    "ha",       FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsHectares,             FactMetaData::_squareMetersToHectares,              FactMetaData::_hectaresToSquareMeters },
-    { "m^2",    "ft\u00B2", FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareFeet,           FactMetaData::_squareMetersToSquareFeet,            FactMetaData::_squareFeetToSquareMeters },
+    { "m^2",    "ft^2",     FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareFeet,           FactMetaData::_squareMetersToSquareFeet,            FactMetaData::_squareFeetToSquareMeters },
     { "m^2",    "ac",       FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsAcres,                FactMetaData::_squareMetersToAcres,                 FactMetaData::_acresToSquareMeters },
-    { "m^2",    "mi\u00B2", FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareMiles,          FactMetaData::_squareMetersToSquareMiles,           FactMetaData::_squareMilesToSquareMeters },
+    { "m^2",    "mi^2",     FactMetaData::UnitArea,                  UnitsSettings::AreaUnitsSquareMiles,          FactMetaData::_squareMetersToSquareMiles,           FactMetaData::_squareMilesToSquareMeters },
     { "m/s",    "ft/s",     FactMetaData::UnitSpeed,                 UnitsSettings::SpeedUnitsFeetPerSecond,       FactMetaData::_metersToFeet,                        FactMetaData::_feetToMeters },
     { "m/s",    "mph",      FactMetaData::UnitSpeed,                 UnitsSettings::SpeedUnitsMilesPerHour,        FactMetaData::_metersPerSecondToMilesPerHour,       FactMetaData::_milesPerHourToMetersPerSecond },
     { "m/s",    "km/h",     FactMetaData::UnitSpeed,                 UnitsSettings::SpeedUnitsKilometersPerHour,   FactMetaData::_metersPerSecondToKilometersPerHour,  FactMetaData::_kilometersPerHourToMetersPerSecond },

src/Geo/Utility.hpp

@@ -85,11 +85,11 @@ namespace GeographicLib {
       // accommodate.
       //
       // 2. We simplify the calculations by moving January and February to the
-      // previous year. Here we internally number the months March–December,
-      // January, February as 0–9, 10, 11.
+      // previous year. Here we internally number the months March-December,
+      // January, February as 0-9, 10, 11.
       //
       // 3. The pattern of month lengths from March through January is regular
-      // with a 5-month period—31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31. The
+      // with a 5-month period-31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31. The
       // 5-month period is 153 days long. Since February is now at the end of
       // the year, we don't need to include its length in this part of the
       // calculation.

src/QtLocationPlugin/QGCTileCacheWorker.cpp

@@ -1137,7 +1137,7 @@ QGCCacheWorker::_testInternet()
         To test if you have Internet connection, the code tests a connection to
         8.8.8.8:53 (google DNS). It appears that some routers are now blocking TCP
         connections to port 53. So instead, we use a TCP connection to "github.com"
-        (80). On exit, if the look up for “github.com” is under way, a call to abort
+        (80). On exit, if the look up for "github.com" is under way, a call to abort
         the lookup is made. This abort call on Android has no effect, and the code
         blocks for a full minute. So to work around the issue, we continue a direct
         TCP connection to 8.8.8.8:53 on Android and do the lookup/connect on the