lint remainder, document test w/ half expr

Author: llogiq

src/arithmetic.rs

@@ -55,7 +55,7 @@ impl LateLintPass for Arithmetic {
         match expr.node {
             hir::ExprBinary(ref op, ref l, ref r) => {
                 match op.node {
-                    hir::BiRem | hir::BiAnd | hir::BiOr | hir::BiBitAnd | 
+                    hir::BiAnd | hir::BiOr | hir::BiBitAnd | 
                     hir::BiBitOr | hir::BiBitXor | hir::BiShl | hir::BiShr | 
                     hir::BiEq | hir::BiLt | hir::BiLe | hir::BiNe | hir::BiGe | 
                     hir::BiGt => return,

tests/compile-fail/arithmetic.rs

@@ -8,7 +8,7 @@ fn main() {
     1 + i; //~ERROR integer arithmetic detected
     i * 2; //~ERROR integer arithmetic detected
     1 % //~ERROR integer arithmetic detected
-    i / 2; 
+    i / 2; // no error, this is part of the expression in the preceding line
     i - 2 + 2 - i; //~ERROR integer arithmetic detected
     -i; //~ERROR integer arithmetic detected