Follow clippy warnings

src/factor_graph.rs

@@ -7,7 +7,7 @@ use log::*;
 use crate::gaussian::Gaussian;
 use crate::math;
 
-#[derive(Clone, Copy, Debug, PartialEq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct VariableId {
     index: usize,
 }

src/lib.rs

@@ -1,5 +1,4 @@
 #![allow(clippy::unreadable_literal, clippy::excessive_precision)]
-#![warn(rust_2018_idioms)]
 
 mod factor_graph;
 mod gaussian;
@@ -234,7 +233,7 @@ impl TrueSkill {
                     ranks[i] == ranks[i + 1],
                 )
             })
-            .collect::<Vec<_>>();;
+            .collect::<Vec<_>>();
 
         for factor in &rating_layer {
             factor.start(&mut variable_arena);
@@ -328,15 +327,16 @@ impl TrueSkill {
             for n in t..t + current.len() {
                 rotated_a_matrix[(row, n)] = flatten_weights[n];
 
-                t += 1;
                 x += 1;
             }
 
+            t += current.len();
+
             for n in x..x + next.len() {
                 rotated_a_matrix[(row, n)] = -flatten_weights[n];
-
-                x += 1;
             }
+
+            x += next.len();
         }
 
         let a_matrix = rotated_a_matrix.transpose();