Remove stray dash in introduction docs
@@ -44,7 +44,7 @@ CPython version and the latest stable release of pypy3 during development.
`ezdxf` is written in pure Python with optional Cython implementations of some
low level math classes and requires only `pyparser` as additional library beside
the Python Standard Library.
-`pytest` is required to run the unit- and integration tests. Data to run the
+`pytest` is required to run the unit and integration tests. Data to run the
stress and audit test can not be provided, because I don't have the rights for
publishing this DXF files.
