fixed some formatting issues (#462)

Author: c252

contents/bubble_sort/code/nim/bubble_sort.nim

@@ -1,14 +1,14 @@
 proc print_array(a: openArray[int]) =
-    for n in 0 .. < len(a):
-        echo a[n]
+  for n in 0 .. < len(a):
+    echo a[n]
 
 proc bubble_sort(a: var openArray[int]) =
-    for i in 0 .. < len(a) - 1:
-        for j in 0 .. < len(a) - 1:
-            if a[j+1] < a[j]:
-                swap(a[j],a[j+1])
+  for i in 0 .. < len(a) - 1:
+    for j in 0 .. < len(a) - 1:
+      if a[j + 1] < a[j]:
+        swap(a[j], a[j + 1])
 
-var x: array[10,int] =  [32,32,64,16,128,8,256,4,512,2]
+var x: array[10,int] =  [32, 32, 64, 16, 128, 8, 256, 4, 512, 2]
 echo "Unsorted:"
 print_array(x)
 echo "\nSorted:"