deletions | additions       diff --git a/foo1.tiff b/foo1.tiff  new file mode 100644  index 0000000..81ff9c4  Binary files /dev/null and b/foo1.tiff differ diff --git a/layout.md b/layout.md  index 065908a..7d88911 100644  --- a/layout.md  +++ b/layout.md 
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Introduction.md /foo1.tiffIntroduction.md  Collaborative Authoring.md  Live Data.md  Linked Code.md