rdkit/rdkit: 2020_03_6 (Q1 2020) Release

(Changes relative to Release_2020.03.5)

Brian Kelley, Kenneth Lum, Paolo Tosco

• unspecified branch bonds in SMARTS don't have aromaticity set (github #3342 from greglandrum)
• Converting atoms with high radical counts to InChI generates incorrect results (github #3365 from greglandrum)
• Replace fill-opacity= with fill-opacity: in MolDraw2DSVG and tests (github #3368 from lummyk)
• Fixes a bug in AddHs() involving sp2 centers with degree 1 (github #3383 from ptosco)
• Information about charges and isotopes lost when calling AdjustQueryProperties (github #3388 from greglandrum)
• prepareMolForDrawing() incorrectly adds chiral Hs if no ring info is present (github #3392 from greglandrum)
• CXSMILES parser should not set atom maps for attachment points (github #3393 from greglandrum)
• Doing a match of a recursive smarts leaves traces of the previous match (github #3403 from bp-kelley)
• Recursive smarts cannot be used in the core for rgroup decomposition (github #3404 from bp-kelley)
• V3K mol blocks with no atoms fail to parse (github #3413 from greglandrum)
• Problem parsing SGroup data containing "" (github #3415 from greglandrum)