Fixed set operation from undefined += to a union (#1963)

Fixed flake8 issues
2016-10-11 04:30:11 -04:00 · 2016-10-11 04:30:11 -04:00 · bd61a36587
commit bd61a36587
parent b7a612dcdf
1 changed files with 2 additions and 1 deletions
--- a/lib/spack/spack/provider_index.py
+++ b/lib/spack/spack/provider_index.py
@ -232,7 +232,8 @@ def merge(self, other):
                    spdict[provided_spec] = opdict[provided_spec]
                    continue

-                spdict[provided_spec] += opdict[provided_spec]
+                spdict[provided_spec] = \
+                    spdict[provided_spec].union(opdict[provided_spec])

    def remove_provider(self, pkg_name):
        """Remove a provider from the ProviderIndex."""