Merge branch 'master' into 'master'

fixed failing test case

See merge request jg943598/rpn_collab!2

test/test.cpp

@@ -10,5 +10,5 @@ TEST_CASE( "some example calculations", "[calc]") {
 TEST_CASE( "Test modulo function", "[calc]") {
   REQUIRE( evaluate("11%") == 0 );
   REQUIRE( evaluate("32%") == 1 );
-  REQUIRE( evaluate("51%") == 4 );
+  REQUIRE( evaluate("51%") == 0 );
 }