Remove fmt::format and replace with std::format

modules/volume/rawvolumewriter.inl

@@ -100,7 +100,7 @@ void RawVolumeWriter<VoxelType>::write(const RawVolume<VoxelType>& volume) {
     std::ofstream file(_path, std::ios::binary);
 
     if (!file.good()) {
-        throw ghoul::RuntimeError(fmt::format("Could not create file '{}'", _path));
+        throw ghoul::RuntimeError(std::format("Could not create file '{}'", _path));
     }
 
     file.write(buffer, length);

modules/volume/rendering/renderabletimevaryingvolume.cpp

@@ -232,7 +232,7 @@ void RenderableTimeVaryingVolume::initializeGL() {
     std::filesystem::path sequenceDir = absPath(_sourceDirectory);
 
     if (!std::filesystem::is_directory(sequenceDir)) {
-        LERROR(fmt::format("Could not load sequence directory '{}'", sequenceDir));
+        LERROR(std::format("Could not load sequence directory '{}'", sequenceDir));
         return;
     }
 
@@ -246,7 +246,7 @@ void RenderableTimeVaryingVolume::initializeGL() {
     // TODO: defer loading of data to later (separate thread or at least not when loading)
     for (std::pair<const double, Timestep>& p : _volumeTimesteps) {
         Timestep& t = p.second;
-        const std::string path = fmt::format(
+        const std::string path = std::format(
             "{}/{}.rawvolume", _sourceDirectory.value(), t.baseName
         );
         RawVolumeReader<float> reader(path, t.metadata.dimensions);

modules/volume/tasks/generaterawvolumetask.cpp

@@ -88,7 +88,7 @@ GenerateRawVolumeTask::GenerateRawVolumeTask(const ghoul::Dictionary& dictionary
 }
 
 std::string GenerateRawVolumeTask::description() {
-    return fmt::format(
+    return std::format(
         "Generate a raw volume with dimenstions: ({}, {}, {}). For each cell, set the "
         "value by evaluating the lua function: `{}`, with three arguments (x, y, z) "
         "ranging from ({}, {}, {}) to ({}, {}, {}). Write raw volume data into '{}' and "