[SQL] Fix typo in DataframeWriter doc

[gczsjdy]

What changes were proposed in this pull request?

The format of none should be consistent with other compression codec(`snappy`, `lz4`) as `none`.

How was this patch tested?

This is a typo.

[HyukjinKwon]

Would you mind checking other typos in this file or module too? It'd be nicer if we fix them in batch,

[gczsjdy]

@HyukjinKwon I can try to find other typos. But actually it's hard to find it until you use a certain API.

[HyukjinKwon]

That's fine. I don't expect a perfect typo hunting but just think it's nicer to check around while we are here.

[gczsjdy]

@HyukjinKwon You are right. I will do my best. : )

[srowen]

@HyukjinKwon I think you can just go ahead with this as a test run merge

[HyukjinKwon]

Sure, will try.

[HyukjinKwon]

ok to test

[HyukjinKwon]

@srowen, I guess I need some manual steps to be added correctly as the admin in Jenkins IIRC. I sent a email to Josh yesterday and will handle this soon. Could you trigger the test here? Just want to be safe for the first try.

[SparkQA]

Test build #3864 has finished for PR 18758 at commit 83530de.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[HyukjinKwon]

Thanks, I merged this into master.