Label bot breaks on text

[zachgk]

The label bot can fail to recognize commands based on the text that comes before it (see apache/mxnet#12487 (comment)). The command works in other issues or other comments. But, the text before the label bot seems to always break the bot.

[harshp8l]

Thanks for bringing up this issue @zachgk. This case should have been handled previously - we should take a look at the logs to better pinpoint the cause of this issue. It seems like this is an issue for text related to the comment specified - seems to be fine for the case here: (apache/mxnet#13163 (comment)).

[lanking520]

@harshp8l It seemed to specifically break with the text like this:

If you are interested, it should not be too difficult to create something like `AppendIter(iters: IndexedSeq[IndexedSeq[DataIter]])`. The [documentation](https://mxnet.incubator.apache.org/versions/master/api/scala/docs/index.html#org.apache.mxnet.DataIter) and the [SyntheticDataIter](https://github.com/apache/incubator-mxnet/blob/master/scala-package/examples/src/main/scala/org/apache/mxnetexamples/imclassification/datasets/SyntheticDataIter.scala) might be good references and it would be a great [contribution](https://mxnet.apache.org/community/contribute.html).