Improve clone detection examples

Author: brendanator

clones/fib2.py

@@ -1,5 +1,5 @@
-n = 5
-a, b = 0, 1
-for _ in range(n):
-    a, b = b, a + b
-print(a)
+def fib(n):
+    a, b = 0, 1
+    for _ in range(n):
+        a, b = b, a + b
+    return a

clones/single_file.py

@@ -1,12 +1,16 @@
 # Here's the first example of duplication
-with open("file1.py") as f:
-    for line in f:
-        print(line)
-        print()
+def remove_duplicates(items):
+    result = []
+    for item in items:
+        if item not in result:
+            result.append(item)
+    return result
 
 
 # Here's the second example of duplication
-with open("file1.py") as f:
-    for line in f:
-        print(line)
-        print()
+def remove_duplicates1(items):
+    result = []
+    for item in items:
+        if item not in result:
+            result.append(item)
+    return result