map unicode process-internal codepoints to replacement character
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Key: LUCENE-2019
URL: https://issues.apache.org/jira/browse/LUCENE-2019
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Reporter: Robert Muir
Priority: Minor
A spinoff from LUCENE-2016.
There are several process-internal codepoints in unicode, we should not store
these in the index.
Instead they should be mapped to replacement character (U+FFFD), so they can be
used process-internally.
An example of this is how Lucene Java currently uses U+FFFF process-internally,
it can't be in the index or will cause problems.
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