fix: correct parsing of units

Author: robjtede

src/parse.rs

@@ -10,7 +10,7 @@ impl std::str::FromStr for ByteSize {
         let number = take_while(value, |c| c.is_ascii_digit() || c == '.');
         match number.parse::<f64>() {
             Ok(v) => {
-                let suffix = skip_while(value, char::is_whitespace);
+                let suffix = skip_while(&value[number.len()..], char::is_whitespace);
                 match suffix.parse::<Unit>() {
                     Ok(u) => Ok(Self((v * u) as u64)),
                     Err(error) => Err(format!(