Change to text3d: When back or front is enabled, the bevel rim on the other side is not created anymore, just as the back/front filling faces are not created when disabled.

when both are off the behavior is unchanged.

This is needed when rendering alpha text so its possible to have a single layer of faces but use the bevel option to make text thicker.
adding a rim on the back when back is disabled also doesnt make much sense IMHO.

minor python edits too.

source/blender/python/doc/examples/bpy.data.py

@@ -18,7 +18,8 @@ if "Cube" in bpy.data.meshes:
 
 
 # write images into a file next to the blend
-file = open(bpy.data.filepath.replace(".blend", ".txt"), 'w')
+import os
+file = open(os.path.splitext(bpy.data.filepath)[0] + ".txt", 'w')
 
 for image in bpy.data.images:
     file.write("%s %dx%d\n" % (image.filepath, image.size[0], image.size[1]))