Add editor structure outline to the developer guide on the website

proc-macros/src/helpers.rs

@@ -72,6 +72,20 @@ pub fn clean_rust_type_syntax(input: String) -> String {
 					chars.next();
 				}
 			}
+			'-' => {
+				if let Some('>') = chars.peek() {
+					while let Some(' ') = result.chars().rev().next() {
+						result.pop();
+					}
+					result.push_str(" -> ");
+					chars.next();
+					while let Some(' ') = chars.peek() {
+						chars.next();
+					}
+				} else {
+					result.push(c);
+				}
+			}
 			':' => {
 				if let Some(':') = chars.peek() {
 					while let Some(' ') = result.chars().rev().next() {