Fix indentation.

Cython/Build/Dependencies.py

@@ -777,11 +777,11 @@ def create_extension_list(patterns, exclude=None, ctx=None, aliases=None, quiet=
             cython_sources = [s for s in pattern.sources
                               if os.path.splitext(s)[1] in ('.py', '.pyx')]
             if cython_sources:
-              filepattern = cython_sources[0]
-              if len(cython_sources) > 1:
-                print("Warning: Multiple cython sources found for extension '%s': %s\n"
-                "See http://cython.readthedocs.io/en/latest/src/userguide/sharing_declarations.html "
-                "for sharing declarations among Cython files." % (pattern.name, cython_sources))
+                filepattern = cython_sources[0]
+                if len(cython_sources) > 1:
+                    print("Warning: Multiple cython sources found for extension '%s': %s\n"
+                          "See http://cython.readthedocs.io/en/latest/src/userguide/sharing_declarations.html "
+                          "for sharing declarations among Cython files." % (pattern.name, cython_sources))
             else:
                 # ignore non-cython modules
                 module_list.append(pattern)