Add some more advice

docs/cocalc-instructions.md

@@ -16,3 +16,9 @@ This tutorial demonstrates how to set up CoCalc to compile the LaTeX script.
    + Create the project and wait for the initialization to finish. It is done when you see a blue button allowing you to “Create or Upload Files …”
 4. Choose “Explorer” on the left side and click on “Upload.” Select your compressed project archive. Once uploaded, click on the name and proceed to “Extract Files …”
 5. Back in the Explorer, you can now navigate through our project directory. Go to the file `main-exercises.tex`. It should load a familiar $\LaTeX$ work environment and automatically build the document for you. Compilation will be triggered whenever you hit `Ctrl + S`.
+
+## Some general advice
+
++ Use the dropdown next to the three colorful buttons to **switch between source code files** related to the same root document. Do not open them in separate tabs via the Explorer.
++ CoCalc **projects stop on inactivity**. You will be prompted to restart the project.
++ When you **add new .tex documents**, CoCalc automatically fills them with some content you may want to use. For our purposes, you may delete this so-called boilerplate code.

main-exercises.tex

@@ -31,12 +31,12 @@
 
 \input{exercises/basic-document-structure/task}
 \subsubsection*{Modify the content below}
-\input{exercises/basic-document-structure/document-structure.raw}
+\codeblock{latex}{exercises/basic-document-structure/document-structure}
 
 \newpage
 \input{exercises/project-structure/task}
 \subsubsection*{Modify the content below}
-\input{exercises/project-structure/tasks.raw}
+\codeblock{latex}{exercises/project-structure/main}
 
 \newpage
 \input{exercises/special-characters/task}