perl minor changes

perl/arrays/arrays.md

@@ -1,4 +1,4 @@
-Array is a variable which gives dynamic storage for a list. SInce list is immutable, you can't change the list items directly. If you want to modify the list, you need to store it in an array variable.
+Array is a variable which gives dynamic storage for a list. Since list is immutable, you can't change the list items directly. If you want to modify the list, you need to store it in an array variable.
 
 Array variable begins with `@`. 
 

perl/introduction/introduction.md

@@ -21,7 +21,7 @@ Perl(Practical Extraction and Report Language) is especially designed for text p
 # Sample program
 
 ```perl
-print "Hello World!!"; // to display "Hello World!!"
+print "Hello World!!"; # to display "Hello World!!"
 ```
 ### Run [here](https://onecompiler.com/perl)
 

perl/operators/operators.md

@@ -141,7 +141,7 @@ Below are the assignment operators present in Perl.
 | >>= | Right shift and assign|	$x >>= 2 is same as $x = $x >> 2|
 | &= | Bitwise and assign| $x &= 10 is same as $x = $x & 10|
 | ^= | Bitwise exclusive OR and assign| $x ^= 10 is same as $x = $x ^ 10|
-| `|=` |Bitwise inclusive OR and assign	| `$x |= 10 is same as $x = $x | 10`|
+| \|= |Bitwise inclusive OR and assign	| `$x |= 10 is same as $x = $x | 10`|
 
 ### Example