Correzione alcune frasi

slides/content.md

@@ -23,7 +23,7 @@
 
 ---
 
-## Submodule: What cat it do?
+## Submodule: What can it do?
 
 A submodule will appear as a subdirectory of our own repository. <!-- .element: class="fragment" -->
 
@@ -31,7 +31,7 @@ Cloning a repository that contains a submodule will not clone it. <!-- .element:
 
 ---
 
-## Submodule: What it can do?
+## Submodule: What can it do?
 
 Once created the sumodule will point always to the same commit. <!-- .element: class="fragment" --> 
 
@@ -47,7 +47,7 @@ Every edit we make inside our submodule will not be pushed upstream. <!-- .eleme
 git submodule add [-b branch_name] repository submodule_directory
 ```
 
-#### Pull the files insidea submodule
+#### Pull the files inside a submodule
 
 ```bash
 git submodule update --init --recursive submodule_directory