rdoc() now checks for topics passed with the double colon operator (e.g. rdoc(MASS::bcv)) (#6).
Now if use_rdoc() has been previously called, re-calling it will move it back to the front of the search path. This addresses the case where another package has also overridden ? and help after use_rdoc().
rdoc() and rdoc_question() now take the closest help and ? from the search path respectively rather than always calling them from utils. This allows for cases when another package has defined replacements (e.g. pkgload).
use_rdoc() now loads the base R library utils to avoid the possibility of being surpassed in the search path at a later point (e.g. on startup if use_rdoc() is set in an .Rprofile) (#1).