Revise C++ coding style using clang-format-6.0

Run the `clang-format.bash` script to update all our C and C++ code to a
new style defined by `.clang-format`.  Use `clang-format` version 6.0.

* If you reached this commit for a line in `git blame`, re-run the blame
  operation starting at the parent of this commit to see older history
  for the content.

* See the parent commit for instructions to rebase a change across this
  style transition commit.

Tests/SimpleInstallS2/inst.cxx

@@ -1,14 +1,14 @@
 #include "foo.h"
 
 #ifdef STAGE_2
-#include <foo/lib1.h>
-#include <foo/lib2renamed.h>
-#include <lib3.h>
-#include <old/lib2.h>
-#include <old/lib3.h>
+#  include <foo/lib1.h>
+#  include <foo/lib2renamed.h>
+#  include <lib3.h>
+#  include <old/lib2.h>
+#  include <old/lib3.h>
 #else
-#include "lib1.h"
-#include "lib2.h"
+#  include "lib1.h"
+#  include "lib2.h"
 #endif
 
 #include "lib4.h"

Tests/SimpleInstallS2/lib2.h

@@ -1,11 +1,11 @@
 #ifdef _WIN32
-#ifdef test2_EXPORTS
-#define CM_TEST_LIB_EXPORT __declspec(dllexport)
+#  ifdef test2_EXPORTS
+#    define CM_TEST_LIB_EXPORT __declspec(dllexport)
+#  else
+#    define CM_TEST_LIB_EXPORT __declspec(dllimport)
+#  endif
 #else
-#define CM_TEST_LIB_EXPORT __declspec(dllimport)
-#endif
-#else
-#define CM_TEST_LIB_EXPORT
+#  define CM_TEST_LIB_EXPORT
 #endif
 
 CM_TEST_LIB_EXPORT float Lib2Func();

Tests/SimpleInstallS2/lib3.h

@@ -1,11 +1,11 @@
 #ifdef _WIN32
-#ifdef test3_EXPORTS
-#define CM_TEST_LIB_EXPORT __declspec(dllexport)
+#  ifdef test3_EXPORTS
+#    define CM_TEST_LIB_EXPORT __declspec(dllexport)
+#  else
+#    define CM_TEST_LIB_EXPORT __declspec(dllimport)
+#  endif
 #else
-#define CM_TEST_LIB_EXPORT __declspec(dllimport)
-#endif
-#else
-#define CM_TEST_LIB_EXPORT
+#  define CM_TEST_LIB_EXPORT
 #endif
 
 CM_TEST_LIB_EXPORT float Lib3Func();

Tests/SimpleInstallS2/lib4.h

@@ -1,11 +1,11 @@
 #ifdef _WIN32
-#ifdef test4_EXPORTS
-#define CM_TEST_LIB_EXPORT __declspec(dllexport)
+#  ifdef test4_EXPORTS
+#    define CM_TEST_LIB_EXPORT __declspec(dllexport)
+#  else
+#    define CM_TEST_LIB_EXPORT __declspec(dllimport)
+#  endif
 #else
-#define CM_TEST_LIB_EXPORT __declspec(dllimport)
-#endif
-#else
-#define CM_TEST_LIB_EXPORT
+#  define CM_TEST_LIB_EXPORT
 #endif
 
 CM_TEST_LIB_EXPORT float Lib4Func();