Fix spacing

Author: JordyAaldering

src/structures/Structures.sac

@@ -5,10 +5,10 @@ import Bits: all;
 import Char: all;
 import String: all;
 #ifdef EXT_STDLIB
-import Complex      : all;
-import Quaternion   : all;
-import Vector3      : all;
-import Vector3f     : all;
+import Complex: all;
+import Quaternion: all;
+import Vector3: all;
+import Vector3f: all;
 #ifndef SAC_BACKEND_MUTC
 import Color8: all;
 import List: all;