tests: fix test test_apparent_size

my 'many' line is: 4.0K   ┌─┴ many        │ the characters 4.0K are 4 chars.

photosheep's space for 'many' is '44B' which is 3 chars and so my system
needs 1 more char. Hence there is one more space character padding
floating round.

tests/test_exact_output.rs

@@ -54,7 +54,11 @@ fn exact_output_test<T: AsRef<OsStr>>(valid_outputs: Vec<String>, command_args:
 
     let will_fail = valid_outputs.iter().any(|i| output.contains(i));
     if !will_fail {
-        eprintln!("output:\n{}\ndoes not contain any of:\n{:?}",output, valid_outputs.iter());
+        eprintln!(
+            "output:\n{}\ndoes not contain any of:\n{}",
+            output,
+            valid_outputs.join("\n\n")
+        );
     }
     assert!(will_fail)
 }
@@ -202,12 +206,19 @@ pub fn test_apparent_size() {
 
 fn apparent_size_output() -> Vec<String> {
     // The apparent directory sizes are too unpredictable and system dependent to try and match
-    let files = r#"
+    let one_space_before = r#"
+ 0B     ┌── a_file
+ 6B     ├── hello_file
+ "#
+    .trim()
+    .to_string();
+
+    let two_space_before = r#"
   0B     ┌── a_file
   6B     ├── hello_file
  "#
     .trim()
     .to_string();
 
-    vec![files]
+    vec![one_space_before, two_space_before]
 }