Merge pull request pypa#223 from berkerpeksag/fix-markup

Fix a Sphinx warning in specifications.rst

Author: ncoghlan

source/specifications.rst

@@ -91,7 +91,7 @@ The platform compatibility tagging model used for ``wheel`` distribution is
 defined in :pep:`425`.
 
 The scheme defined in that PEP is insufficient for public distribution
-of Linux wheel files (and *nix wheel files in general), so :pep:`513` was
+of Linux wheel files (and \*nix wheel files in general), so :pep:`513` was
 created to define the ``manylinux1`` tag.
 
 Recording Installed Distributions