[Rd] (PR#11537) help (using ?) does not handle trailing whitespace

[Prof Brian Ripley]

We don't know how to reproduce this: 'whitespace' is not specific enough.

R's tokenizer breaks input at spaces, so a space would never be part of 
that expression.  And tabs don't even get to the parser in interactive 
use, and you cannot mean a newline.  So exactly what do you mean by 
'whitespace'?

The character in your email as received here is an ASCII space, and that 
is used to end the token on all my systems.  That's not to say that you 
didn't type something else that looks like a space (e.g. a nbspace) since 
email systems are fickle.

None of my guesses worked, so we need precise reproduction instructions.

On Thu, 29 May 2008, rocket at google.com wrote:

>> ?agrep
>>
>
> Results in:
>
> No documentation for 'agrep ' in specified packages and libraries:
> you could try 'help.search("agrep ")'
>
> There is white space after agrep, that ? doesn't ignore.
>
>
> --please do not edit the information below--
>
> Version:
> platform = i486-pc-linux-gnu
> arch = i486
> os = linux-gnu
> system = i486, linux-gnu
> status =
> major = 2
> minor = 7.0
> year = 2008
> month = 04
> day = 22
> svn rev = 45424
> language = R
> version.string = R version 2.7.0 (2008-04-22)
>
> Locale:
> LC_CTYPE=en_US;LC_NUMERIC=C;LC_TIME=C;LC_COLLATE=C;LC_MONETARY=C;LC_MESSAGES=en_US;LC_PAPER=en_US;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US;LC_IDENTIFICATION=C
>
> Search Path:
> .GlobalEnv, package:stats, package:graphics, package:grDevices, package:utils, package:datasets, package:showStructure, package:Rcode, package:splus2R, package:methods, Autoloads, package:base
>
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>

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595