Fix typo “seperate”
diff --git a/Lib/packaging/command/build.py b/Lib/packaging/command/build.py
index 6580fd1..2e5eb8b 100644
--- a/Lib/packaging/command/build.py
+++ b/Lib/packaging/command/build.py
@@ -41,7 +41,7 @@
         ('use-2to3', None,
          "use 2to3 to make source python 3.x compatible"),
         ('convert-2to3-doctests', None,
-         "use 2to3 to convert doctests in seperate text files"),
+         "use 2to3 to convert doctests in separate text files"),
         ('use-2to3-fixers', None,
          "list additional fixers opted for during 2to3 conversion"),
         ]