[Rd] *.Rd file: space after topic in "\alias{topic }" should be (PR#9915)

[bill at insightful.com]

On Mon, 17 Sep 2007 bill at insightful.com wrote:

> Full_Name: Bill Dunlap
> Version: R version 2.6.0 Under development (unstable) (2007-07-26 r42329)
> OS: Linux
> Submission from: (NULL) (24.16.101.199)
>
> If a *.Rd file has an \alias{topic } with a space
> between 'topic' and the closing '}' then the space
> is copied to the help/AnIndex file and help(topic)
> fails to find the help file.
>
> E.g., if the help file starts with
>    \name{test1}
>    \alias{test1 }
>    \alias{test2}
>    \alias{test3 }
>    \alias{test4}
> then help(test1) and help(test4) work, but not
> help(test1) or help(test3).
>
> A possible fix is
> --- share/perl/R/Rdlists.pm     (revision 42846)
> +++ share/perl/R/Rdlists.pm     (working copy)
> @@ -329,7 +329,7 @@
>                 $main::title2file{$rdtitle} = $manfilebase;
>             }
>
> -           while($text =~ s/\\alias\{\s*(.*)\s*\}//){
> +           while($text =~ s/\\alias\{\s*([^\s]*)\s*\}//){
>                 $alias = $1;
>                 $alias =~ s/\\%/%/g;
>                 if ($internal){

It looks like internal spaces are used in \alias entries,
e.g.,
  ./R.utils/man/Non-documented_objects.Rd:\alias{Non-documented objects}
  ./SparseM/man/character-null-class.Rd:\alias{character or NULL-class}
I think the trailing spaces are intended to be ignored,
so a better fix would be

--- Rdlists.pm  (revision 42846)
+++ Rdlists.pm  (working copy)
@@ -332,6 +332,7 @@
            while($text =~ s/\\alias\{\s*(.*)\s*\}//){
                $alias = $1;
                $alias =~ s/\\%/%/g;
+               $alias =~ s/\s*$//;
                if ($internal){
                    $internal{$alias} = 1;
                }



----------------------------------------------------------------------------
Bill Dunlap
Insightful Corporation
bill at insightful dot com
360-428-8146

 "All statements in this message represent the opinions of the author and do
 not necessarily reflect Insightful Corporation policy or position."