[R] double backslashes in usage section of .Rd files

[joerg van den hoff]

I have written a package, where a function definition includes a regexp 
pattern including double backslashes, such as

myfunction <- function (pattern = ".*\\.txt$")
when I R CMD CHECK the corresponding .Rd file, I get warnings 
(code/documentation mismatch), if I enforce two backslashes in the 
documentation print out by

\usage { myfunction (pattern = ".*\\\\.txt$") }
have I to live with this or is their a way to avoid the warnings (apart 
from being satisfied with a wrong manpage ...)?

regards
joerg
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