chore: do not namespace internal functions

jarl.toml

@@ -1,2 +1,2 @@
 [lint]
-exclude = ["tools/"]
+exclude = ["tools/", "inst/"]

tests/testthat/test-layout.R

@@ -345,23 +345,23 @@ test_that("layout normalization handles all-NaN coordinates correctly", {
 
   # Test normal case
   normal_coords <- c(1, 2, 3, 4, 5)
-  normalized <- igraph:::.layout.norm.col(normal_coords, 0, 1)
+  normalized <- .layout.norm.col(normal_coords, 0, 1)
   expect_equal(range(normalized), c(0, 1))
 
   # Test all-NaN case (this was the bug that was fixed)
   nan_coords <- rep(NaN, 5)
-  normalized_nan <- igraph:::.layout.norm.col(nan_coords, 0, 1)
+  normalized_nan <- .layout.norm.col(nan_coords, 0, 1)
   expected_middle <- rep(0.5, 5) # Should return middle value (0+1)/2 = 0.5
   expect_equal(normalized_nan, expected_middle)
 
   # Test all-NaN case with different range
-  normalized_nan_range <- igraph:::.layout.norm.col(nan_coords, -10, 10)
+  normalized_nan_range <- .layout.norm.col(nan_coords, -10, 10)
   expected_middle_range <- rep(0, 5) # Should return middle value (-10+10)/2 = 0
   expect_equal(normalized_nan_range, expected_middle_range)
 
   # Test constant values (difference is zero)
   constant_coords <- rep(5, 5)
-  normalized_constant <- igraph:::.layout.norm.col(constant_coords, 0, 1)
+  normalized_constant <- .layout.norm.col(constant_coords, 0, 1)
   expected_constant_middle <- rep(0.5, 5)
   expect_equal(normalized_constant, expected_constant_middle)
 

tests/testthat/test-sparsedf.R

@@ -1,8 +1,8 @@
 test_that("sdf works", {
-  sdf <- igraph:::sdf
-  `[.igraphSDF` <- igraph:::`[.igraphSDF`
-  `[<-.igraphSDF` <- igraph:::`[<-.igraphSDF`
-  as.data.frame.igraphSDF <- igraph:::as.data.frame.igraphSDF
+  sdf <- sdf
+  `[.igraphSDF` <- `[.igraphSDF`
+  `[<-.igraphSDF` <- `[<-.igraphSDF`
+  as.data.frame.igraphSDF <- as.data.frame.igraphSDF
 
   sdf <- sdf(id = 1:10, color = "black")
   expect_equal(