Remove deprecated Error::description usage (#387)

src/error.rs

@@ -66,19 +66,6 @@ impl Error {
 }
 
 impl error::Error for Error {
-    fn description(&self) -> &str {
-        use self::ErrorKind::*;
-
-        match self.inner {
-            StatusCode(ref e) => e.description(),
-            Method(ref e) => e.description(),
-            Uri(ref e) => e.description(),
-            UriParts(ref e) => e.description(),
-            HeaderName(ref e) => e.description(),
-            HeaderValue(ref e) => e.description(),
-        }
-    }
-
     // Return any available cause from the inner error. Note the inner error is
     // not itself the cause.
     fn source(&self) -> Option<&(dyn error::Error + 'static)> {

src/header/name.rs

@@ -2003,15 +2003,11 @@ impl fmt::Debug for InvalidHeaderName {
 
 impl fmt::Display for InvalidHeaderName {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.description().fmt(f)
+        f.write_str("invalid HTTP header name")
     }
 }
 
-impl Error for InvalidHeaderName {
-    fn description(&self) -> &str {
-        "invalid HTTP header name"
-    }
-}
+impl Error for InvalidHeaderName {}
 
 // ===== HdrName =====
 

src/header/value.rs

@@ -569,27 +569,19 @@ impl fmt::Debug for InvalidHeaderValue {
 
 impl fmt::Display for InvalidHeaderValue {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.description().fmt(f)
+        f.write_str("failed to parse header value")
     }
 }
 
-impl Error for InvalidHeaderValue {
-    fn description(&self) -> &str {
-        "failed to parse header value"
-    }
-}
+impl Error for InvalidHeaderValue {}
 
 impl fmt::Display for ToStrError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.description().fmt(f)
+        f.write_str("failed to convert header to a str")
     }
 }
 
-impl Error for ToStrError {
-    fn description(&self) -> &str {
-        "failed to convert header to a str"
-    }
-}
+impl Error for ToStrError {}
 
 // ===== PartialEq / PartialOrd =====
 

src/method.rs

@@ -365,15 +365,11 @@ impl fmt::Debug for InvalidMethod {
 
 impl fmt::Display for InvalidMethod {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.description())
+        f.write_str("invalid HTTP method")
     }
 }
 
-impl Error for InvalidMethod {
-    fn description(&self) -> &str {
-        "invalid HTTP method"
-    }
-}
+impl Error for InvalidMethod {}
 
 #[test]
 fn test_method_eq() {

src/status.rs

@@ -515,15 +515,11 @@ impl fmt::Debug for InvalidStatusCode {
 
 impl fmt::Display for InvalidStatusCode {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.write_str(self.description())
+        f.write_str("invalid status code")
     }
 }
 
-impl Error for InvalidStatusCode {
-    fn description(&self) -> &str {
-        "invalid status code"
-    }
-}
+impl Error for InvalidStatusCode {}
 
 macro_rules! status_code_strs {
     ($($num:expr,)+) => {

src/uri/mod.rs

@@ -1025,14 +1025,8 @@ impl From<ErrorKind> for InvalidUriParts {
     }
 }
 
-impl fmt::Display for InvalidUri {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.description().fmt(f)
-    }
-}
-
-impl Error for InvalidUri {
-    fn description(&self) -> &str {
+impl InvalidUri {
+    fn s(&self) -> &str {
         match self.0 {
             ErrorKind::InvalidUriChar => "invalid uri character",
             ErrorKind::InvalidScheme => "invalid scheme",
@@ -1049,17 +1043,21 @@ impl Error for InvalidUri {
     }
 }
 
+impl fmt::Display for InvalidUri {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.s().fmt(f)
+    }
+}
+
+impl Error for InvalidUri {}
+
 impl fmt::Display for InvalidUriParts {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
 }
 
-impl Error for InvalidUriParts {
-    fn description(&self) -> &str {
-        self.0.description()
-    }
-}
+impl Error for InvalidUriParts {}
 
 impl Hash for Uri {
     fn hash<H>(&self, state: &mut H)