Eliminate "folder" word usage.

Author: GArik

en/06-git-tools/01-chapter6.markdown

@@ -993,7 +993,7 @@ Then, you e-mail that guy and yell at him.
 
 Sometimes, developers want to get a combination of a large project’s subdirectories, depending on what team they’re on. This is common if you’re coming from CVS or Subversion, where you’ve defined a module or collection of subdirectories, and you want to keep this type of workflow.
 
-A good way to do this in Git is to make each of the subfolders a separate Git repository and then create superproject Git repositories that contain multiple submodules. A benefit of this approach is that you can more specifically define the relationships between the projects with tags and branches in the superprojects.
+A good way to do this in Git is to make each of the subdirectories a separate Git repository and then create superproject Git repositories that contain multiple submodules. A benefit of this approach is that you can more specifically define the relationships between the projects with tags and branches in the superprojects.
 
 ### Issues with Submodules ###