Revert "♻️ Multi-line interface list for quantities"

This reverts commit c2f5f0c.

Author: angularsen

CodeGen/Generators/UnitsNetGen/QuantityGenerator.cs

@@ -62,21 +62,15 @@ namespace UnitsNet
     /// </remarks>");
 
             Writer.WLIfText(1, GetObsoleteAttributeOrNull(_quantity));
-            Writer.WL(@$"
+            Writer.W(@$"
     [DataContract]
-    public readonly partial struct {_quantity.Name} :
-        {(_quantity.GenerateArithmetic ? "IArithmeticQuantity" : "IQuantity")}<{_quantity.Name}, {_unitEnumName}, {_quantity.ValueType}>,");
-
-            if (_quantity.ValueType == "decimal") Writer.WL(@$"
-        IDecimalQuantity,");
-
-            Writer.WL(@$"
-        IComparable,
-        IComparable<{_quantity.Name}>,
-        IConvertible,
-        IEquatable<{_quantity.Name}>,
-        IFormattable");
+    public readonly partial struct {_quantity.Name} : {(_quantity.GenerateArithmetic ? "IArithmeticQuantity" : "IQuantity")}<{_quantity.Name}, {_unitEnumName}, {_quantity.ValueType}>, ");
+            if (_quantity.ValueType == "decimal")
+            {
+                Writer.W("IDecimalQuantity, ");
+            }
 
+            Writer.WL($"IEquatable<{_quantity.Name}>, IComparable, IComparable<{_quantity.Name}>, IConvertible, IFormattable");
             Writer.WL($@"
     {{
         /// <summary>