[grubcfg] add python doc strings

src/modules/fstab/main.py

@@ -168,7 +168,7 @@ class FstabGenerator(object):
             check=check)
 
     def print_fstab_line(self, dct, file=None):
-        """ Prints line to /etc/fstab file.
+        """ Prints line to '/etc/fstab' file.
 
         :param dct:
         :param file:

src/modules/grubcfg/main.py

@@ -23,7 +23,7 @@ import os
 
 
 def modify_grub_default(partitions, root_mount_point, distributor):
-    """
+    """ Configures '/etc/default/grub' for hibernation and plymouth.
 
     :param partitions:
     :param root_mount_point:
@@ -102,8 +102,7 @@ def modify_grub_default(partitions, root_mount_point, distributor):
 
 
 def run():
-    """
-
+    """ Calls routine with given parameters to modify '/etc/default/grub'.
 
     :return:
     """