[SQL][Minor] correct some comments

[OopsOutOfMemory]

No description provided.

[AmplabJenkins]

Can one of the admins verify this patch?

[srowen]

ok to test

[srowen]

(heh, do we even need Jenkins to test comment-only changes like this?)
Yes, very minor, but looks correct on comparing it to the code in DescribeCommand below.

[SparkQA]

Test build #27214 has started for PR 4508 at commit f24aeaf.

• This patch merges cleanly.

[SparkQA]

Test build #27214 has finished for PR 4508 at commit f24aeaf.

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

[AmplabJenkins]

Test PASSed.
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https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/27214/
Test PASSed.

[srowen]

I hate to nit-pick on a trivial change, but please undo this indentation change. From what I see in the rest of the code's scaladoc, continuations are aligned as it was, not wrapped all the way to the left. Have a look at RDD.scala for a lot of examples.

[OopsOutOfMemory]

Thanks @srowen : )

[SparkQA]

Test build #27250 has started for PR 4508 at commit d8a68c6.

• This patch merges cleanly.

[SparkQA]

Test build #27250 has finished for PR 4508 at commit d8a68c6.

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

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/27250/
Test PASSed.