Fix trailing whitepace in src/test.rs

Author: ecstatic-morse

src/test.rs

@@ -573,7 +573,7 @@ fn var_drop_used_simple() {
 fn illegal_subset_error() {
     let program = r"
         placeholders { 'a, 'b }
-        
+
         block B0 {
             // creates a transitive `'b: 'a` subset
             loan_issued_at('x, L0),
@@ -638,7 +638,7 @@ fn transitive_known_subset() {
     let program = r"
         placeholders { 'a, 'b, 'c }
         known_subsets { 'a: 'b, 'b: 'c }
-        
+
         block B0 {
             loan_issued_at('x, L0),
               outlives('a: 'x),
@@ -670,7 +670,7 @@ fn transitive_illegal_subset_error() {
     let program = r"
         placeholders { 'a, 'b, 'c }
         known_subsets { 'a: 'b }
-        
+
         block B0 {
             // this transitive `'a: 'b` subset is already known
             loan_issued_at('x, L0),
@@ -679,7 +679,7 @@ fn transitive_illegal_subset_error() {
 
             // creates unknown transitive subsets:
             // - `'b: 'c`
-            // - and therefore `'a: 'c` 
+            // - and therefore `'a: 'c`
             loan_issued_at('y, L1),
               outlives('b: 'y),
               outlives('y: 'c);