corrected typos

docs/exercise1.rst

@@ -3,7 +3,7 @@ Exercise 1: Managing control flow
 
 With this exercise we will learn to describe the dependencies in control flow 
 between fireworks, exploit possible concurrencies and use the standard firetask 
-ScriptTask. 
+``ScriptTask``. 
 
 Problem 1.1
 -----------
@@ -24,13 +24,12 @@ Add the workflow to the LaunchPad and query its state.
 Execute the workflow with ``rlaunch singleshot``, i.e. run firework at a time.
 
 After running each single firework, monitor the output and the states of the 
-fireworks in the firework until the workflow is completed.
-
+fireworks until the workflow is completed.
 
 
 Problem 1.2
 -----------
 
-Repeat the steps of **Problem 1.1** for the parallel version of the workflow:  
+Repeat the steps of **Problem 1.1** for the parallel version of the workflow:
 **f1_pitstop_par_wrong_1.json**, **f1_pitstop_par_wrong_2.json** and 
 **f1_pitstop_par_wrong_3.json**.