py: Adjust some spaces in code style/format, purely for consistency.
diff --git a/py/mpconfig.h b/py/mpconfig.h
index 824ef76..21ae0c3 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -695,7 +695,7 @@
// must be somehow reachable for marking by the GC, since the native code
// generators store pointers to GC managed memory in the code.
#ifndef MP_PLAT_ALLOC_EXEC
-#define MP_PLAT_ALLOC_EXEC(min_size, ptr, size) do { *ptr = m_new(byte, min_size); *size = min_size; } while(0)
+#define MP_PLAT_ALLOC_EXEC(min_size, ptr, size) do { *ptr = m_new(byte, min_size); *size = min_size; } while (0)
#endif
#ifndef MP_PLAT_FREE_EXEC