[Rd] Statusbar help sometimes displays wrong function (PR#9314)

[fuss-h at ulster.ac.uk]

Full_Name: Hendrik Fuß
Version: 2.4.0
OS: Mac OS 10.4.8
Submission from: (NULL) (201.43.91.248)


Steps to reproduce the bug:

Define the function

  my.mean = function(x,y) (x+y)/2

then type "my.m" in the interactive shell and press TAB. "my.mean(" appears at
the input prompt, but the status bar displays synopsis for mean() rather than
my.mean().