change class names to match file (snake to camel)

Author: Neradoc

libraries/keyboard_layout_mac_fr.py

@@ -32,7 +32,7 @@
 __repo__ = "https://github.com/Neradoc/Circuitpython_Keyboard_Layouts.git"
 
 
-class KeyboardLayoutMacFR(KeyboardLayout):
+class KeyboardLayoutMacFr(KeyboardLayout):
     """Map ASCII characters to appropriate keypresses on a FR Mac keyboard.
     Non-ASCII characters and most control characters will raise an exception.
     """

libraries/keyboard_layout_us_dvo.py

@@ -6,7 +6,7 @@
 
 
 # Verbatim copy from keyboard_layout_us, only rewritten the ASCII_TO_KEYCODE table to match the Dvorak keycodes.
-class KeyboardLayoutUSDVO(KeyboardLayout):
+class KeyboardLayoutUsDvo(KeyboardLayout):
     """Map ASCII characters to appropriate keypresses on a standard US PC keyboard.
     Non-ASCII characters and most control characters will raise an exception.
     """

libraries/keyboard_layout_win_fr.py

@@ -17,7 +17,7 @@
 __repo__ = "https://github.com/Neradoc/Circuitpython_Keyboard_Layouts.git"
 
 
-class KeyboardLayoutFR(KeyboardLayout):
+class KeyboardLayoutWinFr(KeyboardLayout):
     """Map ASCII characters to appropriate keypresses on a standard FR PC keyboard.
     From https://github.com/adafruit/Adafruit_CircuitPython_HID/pull/54
     Non-ASCII characters and most control characters will raise an exception.