Fixed typographical error, changed arbitary to arbitrary in README.

orthographic-pedant · orthographic-pedant · commit b6e62b4e3567 · 2015-09-30T18:51:52.000-04:00
diff --git a/README.md b/README.md
@@ -27,7 +27,7 @@
     Prime test(trial division)
     Prime test(Miller-Rabin's method)
     2D Array
-    Arbitary Integer
+    Arbitrary Integer
     Linear congruential generator
     Maximum subarray problem
 
