Merge pull request #212 from masonmill/patch-1

Fix typo

Author: jamesjuett

docs/setup_xcode.md

@@ -182,7 +182,7 @@ An Xcode target compiles (builds) one executable.
 ### Compile sources
 {: .primer-spec-toc-ignore }
 
-We need to avoid multiple `main()` functions by including the right files in our target.  Click "p1-stats" in the side bar, then "p1-stats" under TARGETS.  Click "Build Phases", the "Compile Sources".  Include the files needed to compile the main program.  Remove any other files by selecting them and clicking on the "–" button.
+We need to avoid multiple `main()` functions by including the right files in our target.  Click "p1-stats" in the side bar, then "p1-stats" under TARGETS.  Click "Build Phases", then "Compile Sources".  Include the files needed to compile the main program.  Remove any other files by selecting them and clicking on the "–" button.
 
 <img src="images/xcode130.png" width="768px" />