relax SVN archive

Fix for the Test_uf_objects.test_uf_object_build_doc() unit test.

The deleted 'prompt_examples' and 'description' variables are not passed into the prompt user
function objects.

The 'prompt_examples' and 'additional' uf structures are no longer passed into the prompt objects.

Removed the 'prompt_examples' and 'additional' variables from the Uf_info containers.

These have been superseded by the Desc_container objects.

Prompt examples are now followed by 2 newlines in the prompt help strings.

This restores much of the original formatting for these examples.

Added support for no spacing in tables for the prompt help strings.

The Desc_container.add_table_titles() method now accepts and stores the 'spacing' arg. This is
passed all the way into the prompt help system to format the tables with.

Fix for the wrapping of tables for the prompt help strings.

Sometimes the total_width was not being reset to the maximum allowed width of status.text_width.

Added a check in the prompt help _build_doc() method for the uf description.

This should, together with the _build_doc() unit tests, help to uncover all unconverted user function
'desc' variables.

Created an algorithm for wrapping table columns to fit within status.text_width.

This if for the prompt user function docstring tables. The columns are now dynamically wrapped so
that the table will not be wider than the given width. For example the value.set user function
description table would normally have a total width of 238 characters, but this now fits within one
screen of text under all operating systems.

Created two unit tests for the _build_doc() methods of the prompt user function objects.

This is for the prompt uf class objects and the user function objects themselves. The _build_doc()
methods are used to generate the prompt help strings.

Second attempt at fixing the problem described at r16578.