Remove semicolons

Remove semicolon in head
Remove semicolon in initial
Remove semicolons in tail

snippets/head.md

@@ -13,5 +13,5 @@ def head(lst):
 ```
 
 ```py
-head([1, 2, 3]); # 1
+head([1, 2, 3]) # 1
 ```

snippets/initial.md

@@ -13,5 +13,5 @@ def initial(lst):
 ```
 
 ```py
-initial([1, 2, 3]); # [1,2]
+initial([1, 2, 3]) # [1,2]
 ```

snippets/tail.md

@@ -13,6 +13,6 @@ def tail(lst):
 ```
 
 ```py
-tail([1, 2, 3]); # [2,3]
+tail([1, 2, 3]) # [2,3]
-tail([1]); # [1]
+tail([1]) # [1]
 ```