applies rustfmt to cleanup

uses std::env::current_dir to find out where the tests are running from

src/number_system_conversion.rs

@@ -1,5 +1,4 @@
 pub struct NumberSystemConversion {}
-
 impl NumberSystemConversion {
     /// byte_to_bool
     ///
@@ -94,7 +93,6 @@ impl NumberSystemConversion {
         (high as u16) << 8 | low as u16
     }
 
-
     /// clear_high_bits
     ///
     /// Clear the 8 MSB of the value
@@ -102,7 +100,7 @@ impl NumberSystemConversion {
     /// ex:  0xffff -> 0x00ff
     ///      0xabcd -> 0x00cd
     pub fn clear_high_bits(to_clear: u16) -> u16 {
-       to_clear & 0x00ff
+        to_clear & 0x00ff
     }
 
     /// clear_low_bits