fix: bug: Si detection was backwards.

kB - means kilobyte 10**3
KiB - means kibibyte 1024 / 2**10

https://en.wikipedia.org/wiki/Byte#Multiple-byte_units

src/display.rs

@@ -411,11 +411,14 @@ fn get_pretty_name(
 
 // If we are working with SI units or not
 pub fn get_type_of_thousand(output_str: &str) -> u64 {
-    let is_si = output_str.contains('i'); // si, KiB, MiB, etc
-    if is_si {
+    if output_str.is_empty() {
+        1024
+    }else if output_str == "si" {
         1000
-    } else {
+    } else if output_str.contains('i') {
         1024
+    } else {
+        1000
     }
 }
 
@@ -550,6 +553,8 @@ mod tests {
     fn test_human_readable_number_si() {
         assert_eq!(human_readable_number(1024 * 100, ""), "100K");
         assert_eq!(human_readable_number(1024 * 100, "si"), "102K");
+        assert_eq!(human_readable_number(1024 * 100, "kB"), "102K");
+        assert_eq!(human_readable_number(1024 * 100, "kiB"), "100K");
     }
 
     #[test]