Update 102-loops.md (#6071)

bug in the code

src/data/roadmaps/linux/content/114-shell-programming/102-loops.md

@@ -13,7 +13,7 @@ Here is a simple sample for loop in bash/shell:
 ```bash
 for i in 1 2 3
 do
-   echo $i
+   echo "$i"
 done
 ```
 This will output:
@@ -23,4 +23,4 @@ This will output:
 3
 ```
 
-This is just the surface of looping in shell programming in Linux. These structures, when used wisely, can enhance your scripts and open up many areas for effective scripting and automation.
+This is just the surface of looping in shell programming in Linux. These structures, when used wisely, can enhance your scripts and open up many areas for effective scripting and automation.