Fix non-standard test feature test collection. I.e. make the feature

collection no rely on implementioned defined behaviour. And fix check
program handling of no-expression invocations vs expression invocations.

include/boost/predef/language/objc.h

@@ -36,8 +36,7 @@ http://www.boost.org/LICENSE_1_0.txt)
 
 #define BOOST_LANG_OBJC_NAME "Objective-C"
 
+#endif
+
 #include <boost/predef/detail/test.h>
 BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_OBJC,BOOST_LANG_OBJC_NAME)
-
-
-#endif

include/boost/predef/language/stdc.h

@@ -47,8 +47,7 @@ If available, the year of the standard is detected as YYYY.MM.1 from the Epoc da
 
 #define BOOST_LANG_STDC_NAME "Standard C"
 
+#endif
+
 #include <boost/predef/detail/test.h>
 BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDC,BOOST_LANG_STDC_NAME)
-
-
-#endif

include/boost/predef/language/stdcpp.h

@@ -52,10 +52,6 @@ Specifically the defined versions are:
 
 #define BOOST_LANG_STDCPP_NAME "Standard C++"
 
-#include <boost/predef/detail/test.h>
-BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDCPP,BOOST_LANG_STDCPP_NAME)
-
-
 /*`
 [heading `BOOST_LANG_STDCPPCLI`]
 
@@ -88,10 +84,6 @@ If available, the year of the standard is detected as YYYY.MM.1 from the Epoc da
 
 #define BOOST_LANG_STDCPPCLI_NAME "Standard C++/CLI"
 
-#include <boost/predef/detail/test.h>
-BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDCPPCLI,BOOST_LANG_STDCPPCLI_NAME)
-
-
 /*`
 [heading `BOOST_LANG_STDECPP`]
 
@@ -117,8 +109,13 @@ BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDCPPCLI,BOOST_LANG_STDCPPCLI_NAME)
 
 #define BOOST_LANG_STDECPP_NAME "Standard Embedded C++"
 
+#endif
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDCPP,BOOST_LANG_STDCPP_NAME)
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDCPPCLI,BOOST_LANG_STDCPPCLI_NAME)
+
 #include <boost/predef/detail/test.h>
 BOOST_PREDEF_DECLARE_TEST(BOOST_LANG_STDECPP,BOOST_LANG_STDECPP_NAME)
-
-
-#endif