Fix preprocessor rules, #1170

demo/kitchen-sink/docs/cpp.cpp

@@ -1,6 +1,21 @@
 // compound assignment operators
 
 #include <iostream>
+
+#include \
+   <iostream>
+
+#include \
+   \
+   <iostream>
+
+#include \
+   \
+   "iostream"
+
+#include <boost/asio/io_service.hpp>
+#include "boost/asio/io_service.hpp"
+
 using namespace std;
 
 int main ()
@@ -9,5 +24,15 @@ int main ()
     a = b;
     a+=2; // equivalent to a=a+2
     cout << a;
+    #if VERBOSE >= 2
+        prints("trace message");
+    #endif
     return 0;
-}
+}
+
+/* Print an error message and get out */
+#define ABORT                             \
+    do {                                  \
+        print( "Abort\n" );                \
+        exit(8);                          \
+} while (0)                      /* Note: No semicolon */