more robust check for enter key in TextBox (#19262)

ianhi · web-flow · commit fce0ee822cbb · 2021-01-09T10:47:17.000+01:00
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -1111,7 +1111,7 @@ def _keypress(self, event):
             self._rendercursor()
             if self.eventson:
                 self._observers.process('change', self.text)
-                if key == "enter":
+                if key in ["enter", "return"]:
                     self._observers.process('submit', self.text)
 
     def set_val(self, val):
