Error in `igraph_version("R")`: unused argument ("R")

test_that("we create graphs of the current version", {
test_that("we can't upgrade from 0.1.1 to 1.5.0, on the fly", {
test_that("we can't upgrade from 0.1.1 to 1.5.0, explicitly", {
test_that("we can't upgrade from 0.2 to 1.5.0, on the fly", {
test_that("we can upgrade from 0.2 to 1.5.0, explicitly", {
test_that("we can't upgrade from 0.5 to 1.5.0, on the fly", {
test_that("we can upgrade from 0.5 to 1.5.0, explicitly", {
test_that("we can't upgrade from 0.6 to 1.5.0, on the fly", {
test_that("we can upgrade from 0.6 to 1.5.0, explicitly", {
test_that("we can upgrade from 1.0.0 to 1.5.0, on the fly", {
test_that("we can upgrade from 1.0.0 to 1.5.0, explicitly", {
test_that("reading of old igraph formats", {
test_that("igraph_version returns a version string", {
## This is essentially a semver regex, we do not allow a

"we create graphs of the current version"
"we can't upgrade from 0.1.1 to 1.5.0, on the fly"
"we can't upgrade from 0.1.1 to 1.5.0, explicitly"
"we can't upgrade from 0.2 to 1.5.0, on the fly"
"we can upgrade from 0.2 to 1.5.0, explicitly"
"we can't upgrade from 0.5 to 1.5.0, on the fly"
"we can upgrade from 0.5 to 1.5.0, explicitly"
"we can't upgrade from 0.6 to 1.5.0, on the fly"
"we can upgrade from 0.6 to 1.5.0, explicitly"
"we can upgrade from 1.0.0 to 1.5.0, on the fly"
"we can upgrade from 1.0.0 to 1.5.0, explicitly"
"igraph_version returns a version string"