clippy fixes

src/diff/graph.rs

@@ -377,7 +377,7 @@ fn allocate_if_new<'syn, 'b>(
             // nestings for each syntax node pair.
             if let Some(allocated) = existing.last() {
                 if existing.len() >= 2 {
-                    return *allocated;
+                    return allocated;
                 }
             }
 

src/main.rs

@@ -15,6 +15,9 @@
 // Has false positives on else if chains that sometimes have the same
 // body for readability.
 #![allow(clippy::if_same_then_else)]
+// Purely stylistic, and ignores whether there are explanatory
+// comments in the if/else.
+#![allow(clippy::bool_to_int_with_if)]
 
 mod constants;
 mod diff;