Update README.rst

Co-Authored-By: Sviatoslav Sydorenko <[email protected]>

Author: RonnyPfannschmidt

README.rst

@@ -6,7 +6,7 @@ in SCM metadata instead of declaring them as the version argument
 or in a SCM managed file.
 
 Additionally ``setuptools_scm`` provides setuptools with a list of files that are managed by the SCM
-(ie. it automatically adds all of the SCM-managed files to the sdist).
+(i.e. it automatically adds all of the SCM-managed files to the sdist).
 Unwanted files must be excluded by discarding them via ``MANIFEST.in``.
 
 .. image:: https://travis-ci.org/pypa/setuptools_scm.svg?branch=master