Fix typo (#142)

docs/new_sets_doc.md

diff --git a/docs/new_sets_doc.md b/docs/new_sets_doc.md
index 2a3fb33..feec3b8 100755
--- a/docs/new_sets_doc.md
+++ b/docs/new_sets_doc.md
@@ -96,7 +96,7 @@
 
 Inserts an element into the set.
 
-Element must be hashable.  This mutates the orginal set.
+Element must be hashable.  This mutates the original set.
 
 
 ### Parameters
@@ -426,7 +426,7 @@
 
 Removes an element from the set.
 
-Element must be hashable.  This mutates the orginal set.
+Element must be hashable.  This mutates the original set.
 
 
 ### Parameters

lib/new_sets.bzl

diff --git a/lib/new_sets.bzl b/lib/new_sets.bzl
index b6fb99d..a213cad 100644
--- a/lib/new_sets.bzl
+++ b/lib/new_sets.bzl
@@ -61,7 +61,7 @@
 def _insert(s, e):
     """Inserts an element into the set.
 
-    Element must be hashable.  This mutates the orginal set.
+    Element must be hashable.  This mutates the original set.
 
     Args:
       s: A set, as returned by `sets.make()`.
@@ -76,7 +76,7 @@
 def _remove(s, e):
     """Removes an element from the set.
 
-    Element must be hashable.  This mutates the orginal set.
+    Element must be hashable.  This mutates the original set.
 
     Args:
       s: A set, as returned by `sets.make()`.