fix comma spelling from coma to comma (#722)

Author: overclockedllama

searches/linear_search.py

@@ -43,7 +43,7 @@ def linear_search(sequence, target):
 
 
 if __name__ == '__main__':
-    user_input = raw_input('Enter numbers separated by coma:\n').strip()
+    user_input = raw_input('Enter numbers separated by comma:\n').strip()
     sequence = [int(item) for item in user_input.split(',')]
 
     target_input = raw_input('Enter a single number to be found in the list:\n')