Switch to using tabs instead of spaces (#9)

Reviewed-on: #9

src/prng/xorshift/xorshift.h

@@ -12,10 +12,10 @@ BEGIN_C_LINKAGE
 
 typedef struct xor_256_state XOR256State;
 struct xor_256_state {
-  u64 x;
-  u64 y;
-  u64 z;
-  u64 w;
+	u64 x;
+	u64 y;
+	u64 z;
+	u64 w;
 };
 
 XOR256State wapp_prng_xorshift_init_state(void);