Fix mismatched_lifetime_syntaxes issue

Author: iorizu

src/lib.rs

@@ -694,7 +694,7 @@ fn trim_indent(mut text: &str) -> String {
         .collect()
 }
 
-fn lines_with_ends(text: &str) -> LinesWithEnds {
+fn lines_with_ends(text: &str) -> LinesWithEnds<'_> {
     LinesWithEnds { text }
 }