Cleanup: double quotes for non-enum strings

Also use back-ticks for code-references in comments.

scripts/templates_py/custom_nodes.py

@@ -19,7 +19,7 @@ class MyCustomTree(NodeTree):
 # Custom socket type
 class MyCustomSocket(NodeSocket):
     # Description string
-    '''Custom node socket type'''
+    """Custom node socket type"""
     # Optional identifier string. If not explicitly defined, the python class name is used.
     bl_idname = 'CustomSocketType'
     # Label for nice name display

scripts/templates_py/driver_functions.py

@@ -1,7 +1,7 @@
 # This script defines functions to be used directly in driver expressions to
 # extend the built-in set of python functions.
 #
-# This can be executed on manually or set to 'Register' to
+# This can be executed on manually or set to "Register" to
 # initialize the functions on file load.
 
 

scripts/templates_py/ui_list_generic.py

@@ -11,7 +11,7 @@ class MyPanel(bpy.types.Panel):
     bl_idname = "SCENE_PT_list_demo"
     bl_space_type = 'VIEW_3D'
     bl_region_type = 'UI'
-    bl_category = 'My Category'
+    bl_category = "My Category"
 
     def draw(self, context):
         layout = self.layout