[MINOR] [SQL] Fix sphinx warnings in PySpark SQL

[MechCoder]

No description provided.

[SparkQA]

Test build #40779 has finished for PR 8171 at commit f1b7378.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds no public classes.

[mengxr]

Could you also fix the warning in core?

[MechCoder]

Which warning is this? I do not get any warning

[SparkQA]

Test build #40786 timed out for PR 8171 at commit 5f3ff18 after a configured wait of 175m.

[mengxr]

I got the following:

/Users/meng/src/spark/python/pyspark/__init__.py:docstring of pyspark.SparkContext.applicationId:4: ERROR: Unexpected indentation.
/Users/meng/src/spark/python/pyspark/__init__.py:docstring of pyspark.SparkContext.applicationId:6: WARNING: Block quote ends without a blank line; unexpected unindent.

[MechCoder]

I still could not reproduce the error. I just guessed it from the warning :P

[SparkQA]

Test build #40812 has finished for PR 8171 at commit d21808c.

• This patch fails PySpark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[MechCoder]

test this please

[SparkQA]

Test build #40844 has finished for PR 8171 at commit d21808c.

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

[mengxr]

This is the generated html doc:

I think we should use - with indentation instead of a] and b].

[MechCoder]

I used asterisks as done in pyspark/mllib/clustering . Hopefully it should look good now.

[SparkQA]

Test build #40851 has finished for PR 8171 at commit 239a8b9.

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

[mengxr]

LGTM. Merged into master and branch-1.5. Thanks!