In anomalous mode (Friedel mates kept separate) unique_reflections counts
I+ and I- of each acentric reflection as two unique members, but the
possible-reflection count used the merged ASU, so completeness approached
200%. Count each acentric possible reflection twice (centric once) when not
merging Friedel mates, matching how unique_reflections is counted; verified
overall completeness 99.7% on the HEWL rotation set.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
leonarski_fandClaude Opus 4.8
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