Fix format issue in map.cons/deduct.verify.cpp

Author: frederick-vs-ja

libcxx/test/std/containers/associative/map/map.cons/deduct.verify.cpp

@@ -115,6 +115,5 @@ int main(int, char**) {
     std::map m(arr);
     // expected-error-re@-1{{no viable constructor or deduction guide for deduction of template arguments of '{{(std::)?}}map'}}
   }
-  
   return 0;
 }