ESC (0x1b) is a terminal control char, don't translate to/from UTF-8 by default

src/encode/cp437_unicode_tbl.c

@@ -74,7 +74,7 @@ uint32_t cp437_unicode_tbl[] =
 	/* 0x18 */ 0x2191,
 	/* 0x19 */ 0x2193,
 	/* 0x1A */ 0x2192,
-	/* 0x1B */ 0x2190,
+	/* 0x1B '\e' */ UNICODE_TERM_CTRL_CHAR_CODE(0x2190),
 	/* 0x1C */ 0x221F,
 	/* 0x1D */ 0x2194,
 	/* 0x1E */ 0x25B2,