add ERR prefix to error

examples/data_type.rs

@@ -37,7 +37,7 @@ static MY_REDIS_TYPE: RedisType = RedisType::new(
 );
 
 unsafe extern "C" fn free(value: *mut c_void) {
-    Box::from_raw(value.cast::<MyType>());
+    drop(Box::from_raw(value.cast::<MyType>()));
 }
 
 fn alloc_set(ctx: &Context, args: Vec<RedisString>) -> RedisResult {

src/key.rs

@@ -410,7 +410,7 @@ where
     /// let hm = ctx
     ///      .open_key(keyname)
     ///      .hash_get_multi(fields)?
-    ///      .ok_or(RedisError::Str("ERR key not found"))?;
+    ///      .ok_or(RedisError::Str("key not found"))?;
     /// let response: HashMap<&str, String> = hm.into_iter().collect();
     /// ```
     ///
@@ -422,7 +422,7 @@ where
     /// let hm = ctx
     ///      .open_key(keyname)
     ///      .hash_get_multi(fields)?
-    ///      .ok_or(RedisError::Str("ERR key not found"))?;
+    ///      .ok_or(RedisError::Str("key not found"))?;
     /// let response: Vec<String> = hm.into_iter().map(|(_, v)| v).collect();
     /// ```
     ///

src/raw.rs

@@ -365,7 +365,7 @@ where
 
     match res {
         Status::Ok => Ok(()),
-        Status::Err => Err(RedisError::Str("ERR key is not a hash value")),
+        Status::Err => Err(RedisError::Str("key is not a hash value")),
     }
 }
 

src/rediserror.rs

@@ -13,18 +13,18 @@ pub enum RedisError {
 impl RedisError {
     #[must_use]
     pub fn nonexistent_key() -> Self {
-        Self::Str("ERR could not perform this operation on a key that doesn't exist")
+        Self::Str("could not perform this operation on a key that doesn't exist")
     }
 
     #[must_use]
     pub fn short_read() -> Self {
-        Self::Str("ERR short read or OOM loading DB")
+        Self::Str("short read or OOM loading DB")
     }
 }
 
 impl<T: std::error::Error> From<T> for RedisError {
     fn from(e: T) -> Self {
-        Self::String(format!("ERR {}", e))
+        Self::String(e.to_string())
     }
 }
 
@@ -45,6 +45,6 @@ impl fmt::Display for RedisError {
             RedisError::String(s) => s.as_str(),
         };
 
-        write!(f, "{}", d)
+        write!(f, "ERR {d}")
     }
 }