remove extra colons in docstring

Author: FoamyGuy

adafruit_display_text/bitmap_label.py

@@ -72,9 +72,9 @@ class Label(LabelBase):
     :param int scale: Integer value of the pixel scaling
     :param bool save_text: Set True to save the text string as a constant in the
      label structure.  Set False to reduce memory use.
-    :param: bool base_alignment: when True allows to align text label to the baseline.
+    :param bool base_alignment: when True allows to align text label to the baseline.
      This is helpful when two or more labels need to be aligned to the same baseline
-    :param: (int,str) tab_replacement: tuple with tab character replace information. When
+    :param (int,str) tab_replacement: tuple with tab character replace information. When
      (4, " ") will indicate a tab replacement of 4 spaces, defaults to 4 spaces by
      tab character"""
 

adafruit_display_text/label.py

@@ -64,7 +64,7 @@ class Label(LabelBase):
     :param int scale: Integer value of the pixel scaling
     :param bool base_alignment: when True allows to align text label to the baseline.
      This is helpful when two or more labels need to be aligned to the same baseline
-    :param: (int,str) tab_replacement: tuple with tab character replace information. When
+    :param (int,str) tab_replacement: tuple with tab character replace information. When
      (4, " ") will indicate a tab replacement of 4 spaces, defaults to 4 spaces by
      tab character"""