Fix url

Author: stewid

R/credential.R

@@ -58,7 +58,7 @@ cred_env <- function(username = NULL, password = NULL) {
 ##' see \code{\link[base]{Startup}}. On GitHub, personal access tokens
 ##' function like ordinary OAuth access tokens. They can be used
 ##' instead of a password for Git over HTTPS, see
-##' \url{help.github.com/articles/creating-an-access-token-for-command-line-use}
+##' \url{https://help.github.com/articles/creating-an-access-token-for-command-line-use}
 ##' @family git credential functions
 ##' @param token The name of the environmental variable that holds the
 ##'     personal access token for the authentication. Default is