Fix: Test TestSafeWriteToDisk now works

Oops, my bad.
Despite the function intending to test SafeWriteToDisk it was actually
calling WriteToDisk. WriteToDisk does not return the file exists error
that SafeWriteToDisk does, which the test checks for.

helpers/path_test.go

@@ -457,7 +457,6 @@ func TestFindCWD(t *testing.T) {
 }
 
 func TestSafeWriteToDisk(t *testing.T) {
-	/*
 	emptyFile, _ := createZeroSizedFileInTempDir()
 	defer deleteFileInTempDir(emptyFile)
 	tmpDir, _ := createEmptyTempDir()
@@ -479,7 +478,7 @@ func TestSafeWriteToDisk(t *testing.T) {
 	}
 
 	for i, d := range data {
-			e := WriteToDisk(d.filename, reader)
+		e := SafeWriteToDisk(d.filename, reader)
 		t.Errorf("Failed: e is %q %#v", e, e)
 		if d.expectedErr != nil {
 			if d.expectedErr.Error() != e.Error() {
@@ -494,7 +493,6 @@ func TestSafeWriteToDisk(t *testing.T) {
 			t.Errorf("Test %d failed. Expected contents %q but got %q", i, randomString, string(contents))
 		}
 	}
-	*/
 }
 
 func TestWriteToDisk(t *testing.T) {