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A general description is here.
symbol() in plotmath expressions was only accepting valid character strings, which made it impossible to specify symbols such as aleph (obtained by symbol("\300")) in a UTF-8 locale.
showMethods() has a "smart" default for 'inherited' such that
showMethods(<genfun>, incl = TRUE) becomes a useful short cut.
The internal equivalents of as.complex, as.double, as.integer and as.logical used to handle length-=1 arguments now accept character strings (rather than report that this is 'unimplemented').
showMethods() has a "smart" default for 'inherited' such that showMethods(<genfun>, incl = TRUE) becomes a useful short cut.
New R_GE_str2col() exported via R_ext/GraphicsEngine.h for
external device developers.
New entry point R_GE_str2col listed in R_ext/GraphicsEngine.h for external graphics device developers.