TD: Switch to non-buffer-based format string interpretation

src/Mod/TechDraw/App/DimensionFormatter.cpp

@@ -27,6 +27,8 @@
 # include <QString>
 #endif
 
+#include <fmt/format.h>
+
 #include <Base/Console.h>
 #include <Base/UnitsApi.h>
 
@@ -275,7 +277,7 @@ QString DimensionFormatter::formatValueToSpec(const double value, QString format
     QString formattedValue;
 
     constexpr auto format = [](QString f, double value){
-        return QString::asprintf(f.toStdString().c_str(), value);
+        return QString::fromStdString(fmt::sprintf(f.toStdString(), value));
     };
 
     QRegularExpression wrRegExp(QStringLiteral("%(?<dec>.*)(?<spec>[wWrR])"));