Make aliases actually be aliases, removing the need to flag them as s…

…uch.

A small and extremely pedantic change that removes the need to flag
'aliases' as duplicates of other, already listed keys.

Signed-off-by: Luke Inman-Semerau <luke.semerau@gmail.com>

py/selenium/webdriver/common/keys.py

@@ -28,17 +28,17 @@ class Keys(object):
     CANCEL       = '\ue001' #  ^break
     HELP         = '\ue002'
     BACKSPACE    = '\ue003'
-    BACK_SPACE   = '\ue003' #  alias
+    BACK_SPACE   = BACKSPACE
     TAB          = '\ue004'
     CLEAR        = '\ue005'
     RETURN       = '\ue006'
     ENTER        = '\ue007'
     SHIFT        = '\ue008'
-    LEFT_SHIFT   = '\ue008' #  alias
+    LEFT_SHIFT   = SHIFT
     CONTROL      = '\ue009'
-    LEFT_CONTROL = '\ue009' #  alias
+    LEFT_CONTROL = CONTROL
     ALT          = '\ue00a'
-    LEFT_ALT     = '\ue00a' #  alias
+    LEFT_ALT     = LEFT_ALT
     PAUSE        = '\ue00b'
     ESCAPE       = '\ue00c'
     SPACE        = '\ue00d'
@@ -47,19 +47,19 @@ class Keys(object):
     END          = '\ue010'
     HOME         = '\ue011'
     LEFT         = '\ue012'
-    ARROW_LEFT   = '\ue012' # alias
+    ARROW_LEFT   = LEFT
     UP           = '\ue013'
-    ARROW_UP     = '\ue013' # alias
+    ARROW_UP     = UP
     RIGHT        = '\ue014'
-    ARROW_RIGHT  = '\ue014' #  alias
+    ARROW_RIGHT  = RIGHT
     DOWN         = '\ue015'
-    ARROW_DOWN   = '\ue015' #  alias
+    ARROW_DOWN   = DOWN
     INSERT       = '\ue016'
     DELETE       = '\ue017'
     SEMICOLON    = '\ue018'
     EQUALS       = '\ue019'
 
-    NUMPAD0      = '\ue01a' #  numbe pad  keys
+    NUMPAD0      = '\ue01a' #  number pad keys
     NUMPAD1      = '\ue01b'
     NUMPAD2      = '\ue01c'
     NUMPAD3      = '\ue01d'