roxygen2 6.1.0 breaks documentation build on windows

[wolski]

Hi,
I am a windows user. After upgrading all my packages under R3.5.1 as well as under R3.4.3
devtools::document() is producing the following problem:

`

devtools::document()
Updating SRMService documentation
Loading SRMService
Package 'SRMService' version 0.1.9.11
Error in file(con, "r") : cannot open the connection
In addition: Warning messages:
1: character(0)
2: roxygen2 requires Encoding: UTF-8
3: In file(con, "r") :
cannot open file 'C:\Users\wewol\prog\SRMService\R': Permission denied
`

An downgrade to roxygen2 6.0.0 solves the problem. Let me know if you need more information. Kind regards.
Witek

PS love roxygen2.

[brodieG]

See also #766, #790