Merge pull request #959 from c-rhodes/patch-1

Update plumbing-porcelain.asc

Author: ben

book/10-git-internals/sections/plumbing-porcelain.asc

@@ -5,7 +5,7 @@ This book covers primarily how to use Git with 30 or so subcommands such as `che
 But because Git was initially a toolkit for a version control system rather than a full user-friendly VCS, it has a number of subcommands that do low-level work and were designed to be chained together UNIX-style or called from scripts.
 These commands are generally referred to as Git's ``plumbing'' commands, while the more user-friendly commands are called ``porcelain'' commands.
 
-As you will have have noticed by now, this book's first nine chapters deal almost exclusively with porcelain commands.
+As you will have noticed by now, this book's first nine chapters deal almost exclusively with porcelain commands.
 But in this chapter, you'll be dealing mostly with the lower-level plumbing commands, because they give you access to the inner workings of Git, and help demonstrate how and why Git does what it does.
 Many of these commands aren't meant to be used manually on the command line, but rather to be used as building blocks for new tools and custom scripts.