Fix test tag parsing to split [.foo] into [.][foo]

projects/SelfTest/IntrospectiveTests/Tag.tests.cpp

@@ -40,3 +40,8 @@ TEST_CASE( "Tag alias can be registered against tag patterns" ) {
         CHECK_THROWS( registry.add( "[@no square bracket at end", "", Catch::SourceLineInfo( "file", 3 ) ) );
     }
 }
+
+TEST_CASE("shortened hide tags are split apart") {
+    auto testcase = Catch::makeTestCase(nullptr, "", {"fake test name", "[.magic-tag]"}, CATCH_INTERNAL_LINEINFO);
+    REQUIRE_THAT(testcase.tags, Catch::VectorContains(std::string("magic-tag")) && Catch::VectorContains(std::string(".")));
+}