docs(array-selector): improve subject clarity

subjects/devops/array-selector/README.md

@@ -5,15 +5,15 @@
 Create a script `array-selector.sh`, which will have an array declared with the
 following values (in this order): `red`, `blue`, `green`, `white`, `black`.
 
-When executed, the script will try to print the element in the position specified in the first argument passed to the script.
+When executed, the script will try to print the element at the position specified in the first argument passed to the script. The script will interpret the position `1` as the element in the array position `0`.
 
 The script should return `Error` when:
 
-- the number of argument passed are different from one,
+- the number of given arguments is different from one,
 
-- the argument passed is not a number, 
+- the given argument is not a number,
 
-- the argument passed is a number out of the array range.
+- the given argument is a number outside the range of the array.
 
 Expected output:
 
@@ -24,7 +24,7 @@ $ ./array-selector.sh 5
 black
 $ ./array-selector.sh 6
 Error
-$ ./array-selector.sh 
+$ ./array-selector.sh
 Error
 $
 ```
@@ -38,8 +38,8 @@ $
 
 array=("one" "two" "three")
 
-echo ${array[0]} # display element in postion 0
-echo ${array[2]} # display element in position 2 
+echo ${array[0]} # display element in position 0
+echo ${array[2]} # display element in position 2
 echo ${#array[@]} # display length of array
 ```
 
@@ -59,7 +59,7 @@ three
 
 if [[ 1 > 2 ]]; then
     echo "true"
-else 
+else
     echo "false"
 fi
 ```
@@ -67,7 +67,7 @@ fi
 And its output:
 
 ```console
-$ bash script.sh 
+$ bash script.sh
 false
 ```