remove ParseIntError / HexFormatError prefix.

Author: mswift42

palette/src/rgb/rgb.rs

@@ -976,10 +976,10 @@ impl core::fmt::Display for FromHexError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match &*self {
             FromHexError::ParseIntError(e) => {
-                write!(f, "ParseIntError: {}", e)
+                write!(f, "{}", e)
             }
             FromHexError::HexFormatError(s) => {
-                write!(f, "HexFormatError: {}, please use format '#fff', 'fff', '#ffffff' or\
+                write!(f, "{}, please use format '#fff', 'fff', '#ffffff' or\
                 'ffffff'.", s)
             }
         }
@@ -1184,7 +1184,7 @@ mod test {
         assert!(c.is_err());
         assert_eq!(
             format!("{}", c.err().unwrap()),
-            "ParseIntError: invalid digit found in string"
+            "invalid digit found in string"
         );
         let c = Rgb::<Srgb,u8>::from_str("#08f");
         assert_eq!(c.unwrap(), Rgb::<Srgb,u8>::new(0, 136, 255));
@@ -1196,7 +1196,7 @@ mod test {
         assert!(c.is_err());
         assert_eq!(
             format!("{}", c.err().unwrap()), 
-            "HexFormatError: invalid hex code format, \
+            "invalid hex code format, \
         please use format \'#fff\', \'fff\', \'#ffffff\' or\'ffffff\'."
         );
         let c = Rgb::<Srgb,u8>::from_str("da0bce");