Avoid warning with brace initializers on clang

Refs #17194

Framework/DataHandling/src/SetSample.cpp

@@ -191,9 +191,9 @@ std::map<std::string, std::string> SetSample::validateInputs() {
   if (geomArgs) {
     if (existsAndNotEmptyString(*geomArgs, GeometryArgs::SHAPE)) {
       const std::array<const std::string *, 6> positiveValues = {
-          &ShapeArgs::HEIGHT,       &ShapeArgs::WIDTH,
-          &ShapeArgs::THICK,        &ShapeArgs::RADIUS,
-          &ShapeArgs::INNER_RADIUS, &ShapeArgs::OUTER_RADIUS};
+          {&ShapeArgs::HEIGHT, &ShapeArgs::WIDTH, &ShapeArgs::THICK,
+           &ShapeArgs::RADIUS, &ShapeArgs::INNER_RADIUS,
+           &ShapeArgs::OUTER_RADIUS}};
       for (const auto &arg : positiveValues) {
         if (existsAndNegative(*geomArgs, *arg)) {
           errors[PropertyNames::GEOMETRY] = *arg + " argument < 0.0";

Framework/DataHandling/test/SetSampleTest.h

@@ -347,7 +347,8 @@ public:
     auto args = boost::make_shared<PropertyManager>();
     args->declareProperty(
         Mantid::Kernel::make_unique<StringProperty>("Shape", "FlatPlate"), "");
-    std::array<const std::string, 3> dimensions = {"Width", "Height", "Thick"};
+    std::array<const std::string, 3> dimensions = {
+        {"Width", "Height", "Thick"}};
     const std::string geometryProp("Geometry");
     for (const auto &dim : dimensions) {
       args->declareProperty(
@@ -367,7 +368,7 @@ public:
     auto args = boost::make_shared<PropertyManager>();
     args->declareProperty(
         Mantid::Kernel::make_unique<StringProperty>("Shape", "Cylinder"), "");
-    std::array<const std::string, 2> dimensions = {"Radius", "Height"};
+    std::array<const std::string, 2> dimensions = {{"Radius", "Height"}};
     const std::string geometryProp("Geometry");
     for (const auto &dim : dimensions) {
       args->declareProperty(
@@ -388,8 +389,8 @@ public:
     auto args = boost::make_shared<PropertyManager>();
     args->declareProperty(
         Mantid::Kernel::make_unique<StringProperty>("Shape", "FlatPlate"), "");
-    std::array<const std::string, 3> dimensions = {"InnerRadius", "OuterRadius",
-                                                   "Height"};
+    std::array<const std::string, 3> dimensions = {
+        {"InnerRadius", "OuterRadius", "Height"}};
     const std::string geometryProp("Geometry");
     for (const auto &dim : dimensions) {
       args->declareProperty(