Fix FTBFS with clang

diff --git a/src/construo.hpp b/src/construo.hpp
index fb77e3e..41aa650 100644
--- a/src/construo.hpp
+++ b/src/construo.hpp
@@ -19,7 +19,7 @@
 
 #include <config.h>
 
-#define CONSTRUO_DATADIR DATADIR"/games/"PACKAGE
+#define CONSTRUO_DATADIR DATADIR "/games/" PACKAGE
 
 class SystemContext;
 class InputContext;
diff --git a/src/command_line.cpp b/src/command_line.cpp
index df4669b..824a947 100644
--- a/src/command_line.cpp
+++ b/src/command_line.cpp
@@ -118,7 +118,7 @@ CommandLine::parse (int argc, char** argv)
 void
 CommandLine::print_help ()
 {
-  std::cout << "Construo "VERSION"\n\n"
+  std::cout << "Construo " VERSION "\n\n"
             << "Usage: construo [OPTIONS] [FILENAME]\n\n"
             << "  -h, --help                  display this help text\n"
             << "  -v,--version                Print version number of the programm\n"
@@ -135,7 +135,7 @@ CommandLine::print_help ()
 void
 CommandLine::print_version ()
 {
-  std::cout << "Construo "VERSION"\n"
+  std::cout << "Construo " VERSION "\n"
             << "Written by Ingo Ruhnke <grumbel@gmx.de>\n\n"
             << "Copyright (C) 2002 Ingo Ruhnke <grumbel@gmx.de>\n"
             << "This is free software; see the source for copying conditions.  There is NO\n"
diff --git a/src/world_gui_manager.cpp b/src/world_gui_manager.cpp
index 9c6a5f4..4a7cef0 100644
--- a/src/world_gui_manager.cpp
+++ b/src/world_gui_manager.cpp
@@ -273,7 +273,7 @@ WorldGUIManager::draw_overlay ()
   graphic_context->draw_string (410, bottom_line, "Zoom: ");
   graphic_context->draw_string (480, bottom_line, to_string(WorldViewComponent::instance()->get_zoom()));
 
-  graphic_context->draw_string (610, bottom_line, "..:: Construo V"VERSION" ::..");
+  graphic_context->draw_string (610, bottom_line, "..:: Construo V" VERSION " ::..");
   //graphic_context->draw_string (680, bottom_line, to_string(WorldViewComponent::instance()->get_zoom()));
 }