esc also needs a low number

gen-key-constants.py

@@ -117,12 +117,12 @@ functional_encoding_overrides = {
     'insert': 2, 'delete': 3, 'page_up': 5, 'page_down': 6,
     'home': 7, 'end': 8, 'tab': 9, 'f1': 11, 'f2': 12, 'enter': 13, 'f4': 14,
     'f5': 15, 'f6': 17, 'f7': 18, 'f8': 19, 'f9': 20, 'f10': 21,
-    'f11': 23, 'f12': 24, 'backspace': 127
+    'f11': 23, 'f12': 24, 'escape': 27, 'backspace': 127
 }
 different_trailer_functionals = {
     'up': 'A', 'down': 'B', 'right': 'C', 'left': 'D', 'end': 'F', 'home': 'H',
     'f1': 'P', 'f2': 'Q', 'f3': 'R', 'f4': 'S', 'enter': 'u', 'tab': 'u',
-    'backspace': 'u'
+    'backspace': 'u', 'escape': 'u'
 }
 functional_key_names: List[str] = []
 name_to_code: Dict[str, int] = {}