Fix some clippy errors that didn't appear on my host version of clippy.

src/parser/latex_environment.rs

@@ -43,13 +43,8 @@ where
     let value_start = remaining;
     start_of_line(remaining)?;
     let (remaining, _leading_whitespace) = space0(remaining)?;
-    let (remaining, (_opening, name, _open_close_brace, _ws, _line_ending)) = tuple((
-        tag_no_case(r#"\begin{"#),
-        name,
-        tag("}"),
-        space0,
-        line_ending,
-    ))(remaining)?;
+    let (remaining, (_opening, name, _open_close_brace, _ws, _line_ending)) =
+        tuple((tag_no_case(r"\begin{"), name, tag("}"), space0, line_ending))(remaining)?;
 
     let latex_environment_end_specialized = latex_environment_end(name.into());
     let parser_context = ContextElement::ExitMatcherNode(ExitMatcherNode {
@@ -127,7 +122,7 @@ fn _latex_environment_end<'b, 'g, 'r, 's, 'c>(
     start_of_line(input)?;
     let (remaining, _leading_whitespace) = space0(input)?;
     let (remaining, (_begin, _name, _close_brace, _ws, _line_ending)) = tuple((
-        tag_no_case(r#"\end{"#),
+        tag_no_case(r"\end{"),
         tag_no_case(current_name_lower),
         tag("}"),
         space0,