Fix python/ir/auto_location.py test on Windows

Author: anmyachev

mlir/test/python/ir/auto_location.py

@@ -34,7 +34,7 @@ def testInferLocations():
         two = arith.constant(IndexType.get(), 2)
 
         # fmt: off
-        # CHECK: loc(callsite("testInferLocations"("{{.*}}[[SEP:[/\\]]]test[[SEP]]python[[SEP]]ir[[SEP]]auto_location.py":31:13 to :43) at callsite("run"("{{.*}}[[SEP]]test[[SEP]]python[[SEP]]ir[[SEP]]auto_location.py":13:4 to :7) at "<module>"("{{.*}}[[SEP]]test[[SEP]]python[[SEP]]ir[[SEP]]auto_location.py":26:1 to :4))))
+        # CHECK: loc(callsite("testInferLocations"("{{.*}}[[SEP:[/\\]+]]test[[SEP]]python[[SEP]]ir[[SEP]]auto_location.py":31:13 to :43) at callsite("run"("{{.*}}[[SEP]]test[[SEP]]python[[SEP]]ir[[SEP]]auto_location.py":13:4 to :7) at "<module>"("{{.*}}[[SEP]]test[[SEP]]python[[SEP]]ir[[SEP]]auto_location.py":26:1 to :4))))
         # fmt: on
         print(op.location)