Update gdaldataset.cpp

[jidanni]

For #9009.

[rouault]

Some tests have to be adapted for that change of error message too:

______________________________ test_basic_test_5 _______________________________

    def test_basic_test_5():

        with gdal.quiet_errors():

            ds = gdal.Open("data/doctype.xml", gdal.GA_ReadOnly)

        last_error = gdal.GetLastErrorMsg()

        expected = "`data/doctype.xml' not recognized as a supported file format"

        if ds is None and expected in last_error:

            return

>       pytest.fail()

E       Failed

/home/travis/build/OSGeo/gdal/build/autotest/gcore/basic_test.py:123: Failed

______________________________ test_ogrinfo_if_ko ______________________________

ogrinfo_path = '/home/travis/build/OSGeo/gdal/build/apps/ogrinfo'

    @pytest.mark.require_driver("GeoJSON")

    def test_ogrinfo_if_ko(ogrinfo_path):

    

        (_, err) = gdaltest.runexternal_out_and_err(

            ogrinfo_path + " -if GeoJSON ../ogr/data/gpkg/2d_envelope.gpkg"

        )

>       assert "not recognized as a supported file format" in err

E       assert 'not recognized as a supported file format' in "ERROR 4: `../ogr/data/gpkg/2d_envelope.gpkg' not recognized as being in a supported file format.\nogrinfo failed - unable to open '../ogr/data/gpkg/2d_envelope.gpkg'.\n\nERROR ret code = 1"

/home/travis/build/OSGeo/gdal/build/autotest/utilities/test_ogrinfo.py:751: AssertionError

[rouault]

Some tests have to be adapted for that change of error message too:

I've added an extra commit to the branch of your pull request fo fix those tests

[coveralls]

coverage: 68.751% (-0.003%) from 68.754%
when pulling ecb2253 on jidanni:patch-21
into fc0ec2b on OSGeo:master.