DMSCoordinateFormat using ',' instead of '.' in German or Portuguese

[michael2402]

This makes the ICoordinateFormatTest fail if the locale is set to German.

org.junit.ComparisonFailure: expected:<47°00'00[.]0"N> but was:<47°00'00[,]0"N>
	at org.junit.Assert.assertEquals(Assert.java:115)
	at org.junit.Assert.assertEquals(Assert.java:144)
	at org.openstreetmap.josm.data.coor.conversion.ICoordinateFormatTest.testFormatting(ICoordinateFormatTest.java:34)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.openstreetmap.josm.testutils.JOSMTestRules$TimeoutThread.run(JOSMTestRules.java:558)

Question is: Should we always format it in the localized way (fix test) or use the '.' separator in all locales?

[Don-vip]

In AbstractCoordinateFormat we expect to always have a dot:

    static {
        // Don't use the localized decimal separator. This way we can present
        // a comma separated list of coordinates.
        cDdFormatter = (DecimalFormat) NumberFormat.getInstance(Locale.UK);
        cDdFormatter.applyPattern("###0.0######");
    }

So this looks like a bug.

[Don-vip]

Same problem with pt_BR, see #16688

[Don-vip]

Same problem with ExifReaderTest.testReadLatLon

junit.framework.AssertionFailedError: expected:<51°46'43[.]0"> but was:<51°46'43[,]0">
	at org.openstreetmap.josm.tools.ExifReaderTest.testReadLatLon(ExifReaderTest.java:107)

[Don-vip]

In 14203/josm:

fix #15696, see #16688 - Don't use the localized decimal separator for coordinates