[edfscan] fix typo

tomoscan/esrf/edfscan.py

@@ -207,7 +207,7 @@ class EDFTomoScan(TomoScanBase):
     def is_abort(self,  **kwargs) -> bool:
         abort_file = os.path.basename(self.path) + self.ABORT_FILE
         abort_file = os.path.join(self.path, abort_file)
-        if 'src_pattern' in kwargs and kwargs['src_pattern' is not None]:
+        if 'src_pattern' in kwargs and kwargs['src_pattern'] is not None:
             assert 'dest_pattern' in kwargs
             abort_file = abort_file.replace(kwargs['src_pattern'],
                                             kwargs['dest_pattern'])