Squashed 'third_party/boostorg/assert/' content from commit 4bd93cd

Change-Id: I7f6cb35310fc8236af3a608fd27ff62c3817fdb9
git-subtree-dir: third_party/boostorg/assert
git-subtree-split: 4bd93cd4141b5d48e090495551e3bce931321f62
diff --git a/doc/index-docinfo-footer.html b/doc/index-docinfo-footer.html
new file mode 100644
index 0000000..b27346f
--- /dev/null
+++ b/doc/index-docinfo-footer.html
@@ -0,0 +1,5 @@
+<style>
+
+*:not(pre)>code { background: none; color: #600000; }
+
+</style>