Massive modularization fixes

Author: Matthias Koeppe

src/sage/rings/padics/padic_base_generic.py

@@ -433,11 +433,11 @@ def plot(self, max_points=2500, **args):
 
         EXAMPLES::
 
-            sage: Zp(3).plot()
+            sage: Zp(3).plot()                                                          # optional - sage.plot
             Graphics object consisting of 1 graphics primitive
-            sage: Zp(5).plot(max_points=625)
+            sage: Zp(5).plot(max_points=625)                                            # optional - sage.plot
             Graphics object consisting of 1 graphics primitive
-            sage: Zp(23).plot(rgbcolor=(1,0,0))
+            sage: Zp(23).plot(rgbcolor=(1,0,0))                                         # optional - sage.plot
             Graphics object consisting of 1 graphics primitive
         """
         if 'pointsize' not in args: