This module provides a mutable #String like object, #TStringBuilder.

Unlike with an instance of #String, a #TStringBuilder object can be modified by
appending, removing, replacing or inserting characters. A #TStringBuilder object
maintains an internal buffer to efficiently accommodate expansions to the string.
New text is appended to the buffer there is space available, or a larger buffer is
allocated and the text copied into the new buffer.

The contents of a #String, on the other hand, cannot be modified, and any manipulation
of a #String (like adding two strings together) results in the creation of new #String objects.

If you intend to perform extensive string manipulation, you should certainly consider using
a #TStringBuilder.

> Although #TStringBuilder generally offers better efficiency over #String, you don't
necessarily want to replace all uses of #String with #TStringBuilder whenever you do
string manipulation. There are a number of factors - like the size of the string, memory
allocations, the system you are running on, and the kind of operation - which determine
whether using a #TStringBuilder offers a significant performance improvement. Try to
benchmark any changes you make to ensure you are using the best features.