Add the exercises for basic commands to the rendered pages as well

Author: bbrydsoe

docs/basic-commands-exercises.md

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+# Exercises - Basic Commands
+
+## Try out the basic commands 
+
+The purpose of this exercise is to learn about basic commands further.
+
+1. Create a folder called "mysecondrepo" which will contain your repository. 
+Tasks:
+      - initialize the repository
+      - create a README.md file and add this text on the first line: "File created on Sep. 30, 2020" 
+      - stage the file
+      - commit the changes
+      - create a second file "Poem.md" without any text (hint: use touch command), stage and commit it
+      
+2. Copy and paste the two paragraphs below of the poem *la lluvia* by Jorge Luis Borges into the Poem.md file:
+Tasks:
+      - stage the first paragraph only
+      - confirm that the file has been partially staged by checking the status. 
+      - check if the staged changes correspond to just the first paragraph by looking at the differences between: 
+      -- the working directory vs. the staging area 
+      -- the staging area vs. the committed changes region (Repo) 
+      - commit the staged changes and check the status
+      - stage the second paragraph and commit the changes
+      
+<pre><code>
+Bruscamente la tarde se ha aclarado
+Porque ya cae la lluvia minuciosa.
+Cae o cayó. La lluvia es una cosa
+Que sin duda sucede en el pasado.
+
+Quien la oye caer ha recobrado
+El tiempo en que la suerte venturosa
+Le reveló una flor llamada rosa
+Y el curioso color del colorado.
+</code></pre>      
+
+3. Create a folder called "FirstPoem" and move the Poem.md file to this new folder (use git mv). 
+Check the status to confirm that the file was moved. Commit the changes. 
+
+4. (Challenge task) Add the next paragraph of the poem:
+
+<pre><code>
+Esta lluvia que ciega los cristales
+Alegrará en perdidos arrabales
+Las negras uvas de una parra en cierto
+
+Patio que ya no existe. La mojada
+Tarde me trae la voz, la voz deseada,
+De mi padre que vuelve y que no ha muerto.
+</code></pre>  
+
+stage the changes and commit them. Now, we have the last four commits refering to the same topic (same poem). 
+The goal of this part of the exercise is to summarize those four commits into a single one.
+
+hint: git rebase -i HEAD~4
+
+5. End of exercise
+
+## git diff usage 
+
+The purpose of this exercise is to show you the usage of the *git diff* command.
+
+1. Create a folder called "myfirstrepo" which will contain your repository. 
+Tasks:
+      - initialize the repository
+      - create a README.md file and add this text on the first line: "File created on Sep. 30, 2020" 
+      - stage the file
+      - commit the changes
+
+At this point, your working directory, the staging area, and the local repository
+(committed changes) are all synchronized.
+
+2. Make a change to the README.md file by adding a line with the string "TODO list". Now, the
+staging area and the local repository are synchronized with each other but the working
+directory is not synchronized with them. 
+      - check the differences between the working directory and the staging area
+        (hint: git diff)
+      - check the differences between the working directory and the local repository
+        (hint: git diff HEAD)
+
+confirm that the changes correspond to what you expected by looking at the diff outputs.
+
+3. Add the file README.md to the staging area. Now, the working directory and the staging area
+are synchronized with each other but they are not synchronized with the local repository.
+      - check the differences between the staging area and the local repository
+        (hint: git diff --staged)
+      - check the differences between the working directory and the local repository
+        (hint: git diff HEAD)
+
+confirm that the changes correspond to what you expected by looking at the diff outputs.
+
+4. Make an additional modification to the README.md file by adding a line with the string 
+"Add the support email". Now, all the three areas working directory, the staging area
+and the local repository are not synchronized with each other. 
+      - check the differences between the working directory and the staging area
+        (hint: git diff)
+      - check the differences between the staging area and the local repository
+        (hint: git diff --staged)
+      - check the differences between the working directory and the local repository
+        (hint: git diff HEAD)
+
+
+confirm that the changes correspond to what you expected by looking at the diff outputs.
+
+5. End of exercise
+