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‘model.frame()’ now clears the object bit when removing the ‘class’ attribute of a value via ‘na.action’ (PR#18100).
‘charClass()’ now works with multi-character strings on Windows (PR#18104, fixed by Bill Dunlap).
‘encodeString()’ on Solaris now works again in Latin-1 encoding on characters represented differently in UTF-8. Support for surrogate pairs on Solaris has been improved.
‘file.show()’ on Windows now works with non-ASCII path names representable in the current native encoding (PR#18132).
Embedded R on Windows can now find R home directory via the registry even when installed only for the current user (PR#18135).