allow srctree header commands to be wrapped in triple string quotes to stop...

allow srctree header commands to be wrapped in triple string quotes to stop IDEs from complaining about them

Cython/TestUtils.py

@@ -189,7 +189,8 @@ def unpack_source_tree(tree_file, dir=None):
         elif cur_file is not None:
             cur_file.write(line)
         elif line.strip() and not line.lstrip().startswith('#'):
-            header.append(line)
+            if line.strip() not in ('"""', "'''"):
+                header.append(line)
     if cur_file is not None:
         cur_file.close()
     return dir, ''.join(header)