Update balanced_parentheses.py (TheAlgorithms#538)

hrushi-hanbar · harshildarji · commit f1ec84af8477 · 2018-10-30T15:29:12.000+01:00
diff --git a/data_structures/stacks/balanced_parentheses.py b/data_structures/stacks/balanced_parentheses.py
@@ -6,7 +6,7 @@
 
 
 def balanced_parentheses(parentheses):
-    """ Use a stack to check if a string of parentheses are balanced."""
+    """ Use a stack to check if a string of parentheses is balanced."""
     stack = Stack(len(parentheses))
     for parenthesis in parentheses:
         if parenthesis == '(':
