updated newFont to new_font for plint

Author: Margaret Matocha

adafruit_display_text/label.py

@@ -235,14 +235,15 @@ def font(self):
         return self._font
 
     @font.setter
-    def font(self, newFont):
-        old_text = self._text
-        self._text = ""
-        self._font = newFont
+    def font(self, new_font):
+        old_text=self._text
+        self._text=''
+        self._font=new_font
         bounds = self._font.get_bounding_box()
-        self.height = bounds[1]
+        self.height = bounds[1] 
         self._update_text(str(old_text))
 
+
     @property
     def anchor_point(self):
         """Point that anchored_position moves relative to.