Revise include order using clang-format-6.0

Run the `clang-format.bash` script to update our C and C++ code to a new
include order `.clang-format`.  Use `clang-format` version 6.0.

4 files changed, 8 insertions, 5 deletions

diff --git a/Tests/FindGTK2/cairomm/main.cpp b/Tests/FindGTK2/cairomm/main.cpp
index 4432601..48e5e39 100644
--- a/Tests/FindGTK2/cairomm/main.cpp
+++ b/Tests/FindGTK2/cairomm/main.cpp
@@ -8,13 +8,13 @@
 #  define _USE_MATH_DEFINES
 #endif
 
-#include <cairomm/context.h>
-#include <cairomm/surface.h>
-#include <cairommconfig.h>
+#include <cmath>
 #include <iostream>
 #include <string>
 
-#include <cmath>
+#include <cairomm/context.h>
+#include <cairomm/surface.h>
+#include <cairommconfig.h>
 
 int main()
 {
diff --git a/Tests/FindGTK2/gtkmm/helloworld.cpp b/Tests/FindGTK2/gtkmm/helloworld.cpp
index 5f4e0ae..45c9422 100644
--- a/Tests/FindGTK2/gtkmm/helloworld.cpp
+++ b/Tests/FindGTK2/gtkmm/helloworld.cpp
@@ -1,4 +1,5 @@
 #include "helloworld.h"
+
 #include <iostream>
 
 HelloWorld::HelloWorld()
diff --git a/Tests/FindGTK2/gtkmm/main.cpp b/Tests/FindGTK2/gtkmm/main.cpp
index 1637da2..29e23fd 100644
--- a/Tests/FindGTK2/gtkmm/main.cpp
+++ b/Tests/FindGTK2/gtkmm/main.cpp
@@ -1,6 +1,7 @@
-#include "helloworld.h"
 #include <gtkmm.h>
 
+#include "helloworld.h"
+
 int main(int argc, char* argv[])
 {
   Gtk::Main kit(argc, argv);
diff --git a/Tests/FindGTK2/sigc++/main.cpp b/Tests/FindGTK2/sigc++/main.cpp
index e56b910..4dae4f4 100644
--- a/Tests/FindGTK2/sigc++/main.cpp
+++ b/Tests/FindGTK2/sigc++/main.cpp
@@ -1,6 +1,7 @@
 // Taken from https://developer.gnome.org/libsigc++-tutorial/stable/ch02.html
 
 #include <iostream>
+
 #include <sigc++/sigc++.h>
 
 class AlienDetector