[Rd] tiny bib glitch in src/librar/stats/man/spectrum.Rd

[Ben Bolker]

   (I think I'm having bad R-devel karma these days.)

   I hit some errors installing the latest r-devel, but they seem to 
have been transient.  In the meantime, while I was poking around I found 
a minor issue (I think) with the use of the bibcitep macro  in one of 
the stats man pages.


R/src/library/stats/man/spectrum.Rd has the line:

   \bibcitep{e.g.,|R:Bloomfield:1976|} or 1 and range

When running code to parse this I'm getting the warning

Warning: spectrum.Rd:66: Could not find bibentries for the following keys:
   ‘e.g.’

I think this is because the comma after "e.g." means that the arguments 
of bibcitep are being interpreted as a comma-separated list of bibtex 
keys: from WRE,

 > Textual and parenthetical citations are obtained via, respectively, 
\bibcitet and \bibcitep (the naming follows that of \citet and \citep in 
the LaTeX natbib package (Daly 2010). These single-argument macros both 
take either a comma-separated list of one or more keyspecs or a single 
citespec of the form before|keyspec|after with both ‘|’ mandatory and 
before and after possibly empty text to be inserted before and after the 
citation if not empty.