fix: \r escape for libreoffice (#17)

docx-core/src/escape/mod.rs

@@ -5,5 +5,6 @@ pub(crate) fn escape(text: &str) -> String {
         .replace('"', """)
         .replace('\'', "'")
         .replace('\n', "
")
+        // If \r escape to &#xD, this cause error in libreoffice
         .replace('\r', "
")
 }