small fixes

src/sections/intro.tex

@@ -154,7 +154,7 @@ main:
 
         [...]
 
-        - !include path/to/my/subtest.cpt
+        - !include path/to/my/subtest.tum
 
         [...]
 
@@ -188,7 +188,7 @@ report:
     \begin{itemize}
       \item Built-in variables:
       \begin{itemize}
-        \item \incode{test\_directory}: the folder of the main cpt file
+        \item \incode{test\_directory}: the folder of the main tum file
         \item \incode{test\_main\_file}: the main tum file
         \item \incode{os}: The OS used by the system (Linux or Windows)
         \item \incode{host\_name}: The hostname of the machine