being able to write test script which verify that fts3 is internally
building indices in the expected way. Both new functions are only
defined if fts3.c is compiled with SQLITE_TEST defined, as when
building testfixture. These functions are not intended to be part of
the exposed fts3 API.
dump_terms() generates a TEXT result of all the terms in the index (or
a specified segment), sorted and joined with spaces.
dump_doclist() generates a TEXT representation of the doclist
associated with a given term in the index (or a specified segment). (CVS 5340)
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