[R] "R CMD Rd2txt" generate "_^H" for in all section titles

[Zheng Da]

Hello,

I'm trying to generate plain text from the .Rd files. I run "R CMD
Rd2txt xx.Rd -o xx.txt" to get the plain text file. When I open the
text file, I see "_^H" in front of each character in all section
titles. I can't figure out where the problem is. If I don't specify -o
argument, "R CMD Rd2txt" prints on the standard output correctly. What
should I do to output everything correctly to a file?

Thanks,
Da