Update test_distribution.py

Author: mayeut

tests/test_distribution.py

@@ -34,7 +34,7 @@ def test_source_distribution(virtualenv, tmpdir):
     assert len(sdists) == 1
 
     skbuild_configure_options = "-DCMAKE_JOB_POOL_COMPILE:STRING=compile"
-    skbuild_configure_options += "-DCMAKE_JOB_POOL_LINK:STRING=link"
+    skbuild_configure_options += " -DCMAKE_JOB_POOL_LINK:STRING=link"
     skbuild_configure_options += " '-DCMAKE_JOB_POOLS:STRING=compile=4;link=3'"
     if os.path.exists("/usr/local/ssl"):
         skbuild_configure_options = "-DOPENSSL_ROOT_DIR:PATH=/usr/local/ssl " + skbuild_configure_options