[Rd] html help fails for named vector objects (PR#9927)

[John.Maindonald at anu.edu.au]

   help(letters, htmlhelp=TRUE) fails.

Under the Mac OSX gui, the message is 'Help for the topic "a" was not  
found.' Under the version documented below, and under Windows, the  
message is

   "No documentation for 'a' in specified packages and libraries:"
repeated for all the elements of letters, then followed by
   "you could try 'help.search("a")'",
again repeated for all elements of letters.

The outcome seems similar for any character vector (including matrix)  
object, e.g. the matrix 'primateDNA' in the DAAGbio package.

The following have the expected result
   help("letters", htmlhelp=TRUE)
   help(letters, htmlhelp=FALSE)

The same result is obtained with R-2.5.1.


--please do not edit the information below--

Version:
platform = i386-apple-darwin8.10.1
arch = i386
os = darwin8.10.1
system = i386, darwin8.10.1
status = beta
major = 2
minor = 6.0
year = 2007
month = 09
day = 22
svn rev = 42941
language = R
version.string = R version 2.6.0 beta (2007-09-22 r42941)

Locale:
C

Search Path:
.GlobalEnv, package:testpkg, package:stats, package:graphics,  
package:grDevices, package:utils, package:datasets, package:methods,  
Autoloads, package:base

John Maindonald             email: john.maindonald at anu.edu.au
phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
Centre for Mathematics & Its Applications, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.