Minor corrections and consistency

src/errors.rs

@@ -467,9 +467,9 @@ pub mod serialize {
             match self {
                 SeError::Custom(s) => write!(f, "{}", s),
                 SeError::Io(e) => write!(f, "I/O error: {}", e),
-                SeError::Fmt(e) => write!(f, "Formatting error: {}", e),
-                SeError::Unsupported(s) => write!(f, "Unsupported value: {}", s),
-                SeError::NonEncodable(e) => write!(f, "Malformed UTF-8: {}", e),
+                SeError::Fmt(e) => write!(f, "formatting error: {}", e),
+                SeError::Unsupported(s) => write!(f, "unsupported value: {}", s),
+                SeError::NonEncodable(e) => write!(f, "malformed UTF-8: {}", e),
             }
         }
     }

src/se/key.rs

@@ -1,4 +1,4 @@
-use crate::errors::serialize::SeError;
+use crate::se::SeError;
 use serde::ser::{Impossible, Serialize, Serializer};
 use serde::serde_if_integer128;
 use std::fmt::Write;

src/writer.rs

@@ -278,7 +278,7 @@ impl<W: Write> Writer<W> {
     /// # use serde::Serialize;
     /// # use quick_xml::events::{BytesStart, Event};
     /// # use quick_xml::writer::Writer;
-    /// # use quick_xml::SeError;
+    /// # use quick_xml::se::SeError;
     /// # fn main() -> Result<(), SeError> {
     /// #[derive(Debug, PartialEq, Serialize)]
     /// struct MyData {

tests/serde-se.rs

@@ -1,7 +1,6 @@
 use quick_xml::de::from_str;
-use quick_xml::se::Serializer;
+use quick_xml::se::{SeError, Serializer};
 use quick_xml::utils::Bytes;
-use quick_xml::SeError;
 
 use serde::{serde_if_integer128, Deserialize, Serialize};
 use std::collections::BTreeMap;