STYLE: Replace Fill(T{}) w/ {} initializer for local variables in tests

Replaced code of the form

    Type var;
    var.Fill(ElementType{});

with `Type var{};`

Using Notepad++, Replace in Files, doing:

    Find what: ^([ ]+ [^ ].*[ ])(\w+);[\r\n]+ [ ]+\2\.Fill\(.+{}\);
    Replace with: $1$2{};
    Filters: itk*Test*.cxx
    [v] Match case
    (*) Regular expression

Follow-up to pull request #4881
commit 569a8b6
"STYLE: Replace Fill(0) with {} initializer for local variables in tests"

Author: N-Dekker

Modules/Filtering/ImageFusion/test/itkLabelToRGBImageFilterTest.cxx

@@ -60,8 +60,7 @@ itkLabelToRGBImageFilterTest(int argc, char * argv[])
   filter->SetBackgroundValue(backgroundValue);
   ITK_TEST_SET_GET_VALUE(backgroundValue, filter->GetBackgroundValue());
 
-  typename FilterType::OutputPixelType backgroundColor;
-  backgroundColor.Fill(typename FilterType::OutputPixelValueType{});
+  typename FilterType::OutputPixelType backgroundColor{};
   filter->SetBackgroundColor(backgroundColor);
   ITK_TEST_SET_GET_VALUE(backgroundColor, filter->GetBackgroundColor());
 

Modules/IO/HDF5/test/itkHDF5ImageIOTest.cxx

@@ -271,8 +271,7 @@ HDF5ReadWriteTest(const char * fileName)
     success = EXIT_FAILURE;
   }
 
-  itk::Array<char> metaDataCharArray2;
-  metaDataCharArray2.Fill(char{});
+  itk::Array<char> metaDataCharArray2{};
   if (!itk::ExposeMetaData<itk::Array<char>>(metaDict2, "TestCharArray", metaDataCharArray2) ||
       metaDataCharArray2 != metaDataCharArray)
   {

Modules/Registration/Metricsv4/test/itkImageToImageMetricv4RegistrationTest.cxx

@@ -67,8 +67,7 @@ ImageToImageMetricv4RegistrationTestRun(typename TMetric::Pointer  metric,
   typename TImage::SpacingType spacing;
   spacing.Fill(itk::NumericTraits<CoordinateRepresentationType>::OneValue());
 
-  typename TImage::PointType origin;
-  origin.Fill(CoordinateRepresentationType{});
+  typename TImage::PointType origin{};
 
   typename TImage::DirectionType direction;
   direction.Fill(itk::NumericTraits<CoordinateRepresentationType>::OneValue());

Modules/Registration/Metricsv4/test/itkObjectToObjectMultiMetricv4RegistrationTest.cxx

@@ -95,8 +95,7 @@ ObjectToObjectMultiMetricv4RegistrationTestCreateImages(typename TImage::Pointer
   typename TImage::SpacingType spacing;
   spacing.Fill(itk::NumericTraits<CoordinateRepresentationType>::OneValue());
 
-  typename TImage::PointType origin;
-  origin.Fill(CoordinateRepresentationType{});
+  typename TImage::PointType origin{};
 
   typename TImage::DirectionType direction;
   direction.Fill(itk::NumericTraits<CoordinateRepresentationType>::OneValue());