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qgamma() warns if used with shape < 1e-10, when it may be unreliable. (PR#12324)
Installing a source package was not using the package's declared encoding (if any) as a default encoding for the help.search() database in Meta/hsearch.rds. This could cause packages with a default encoding to have some of their entries rejected by help.search() in a multi-byte locale (such as a UTF-8 locale).
pbeta() is more accurate in some cases with extreme values of 'ncp'. (PR#11277).