fix REP MOVSB doc comment typo
@@ -175,8 +175,8 @@ bool _mi_page_is_valid(mi_page_t* page);
#endif
// ------------------------------------------------------
-// Fast `memcpy()` on x86(_64) platforms unavailable,
-// use REP MOVSB
+// Fast `memcpy()` on x86(_64) platforms unavailable
+// on Windows, use REP MOVSB if necessary
// ------------------------------------------------------
#if defined(_M_IX86) || defined(_M_X64)
