[SQL][Docs] updated the documentation for explode

[lockwobr]

the syntax was incorrect in the example in explode

[sarutak]

ok to test.

[sarutak]

LGTM. Pending Jenkins.

[rxin]

Jenkins, ok to test.

[SparkQA]

Test build #35519 has finished for PR 6943 at commit 3d864d1.

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

[srowen]

Does ...(_.split(" ")) work here too? not sure, ignore me if it can't be written that way.
Ideally put [DOCS] in the title please, but this may yet be something trivial enough to not need a JIRA. Please review https://cwiki.apache.org/confluence/display/SPARK/Contributing+to+Spark
@sarutak I think you can try out merging when you're ready

[lockwobr]

@srowen
Well it can kind of work that way if you type it like this (below) not sure what style spark community prefers, left it more closer to the original documentation.

df.explode[String, String]("words", "word"){_.split(" ")}

I didn't think that I needed a JIRA ticket. The JIRA the documentation stated "However, trivial changes, where the what should change is virtually the same as the how it should change do not require a JIRA. Example: "Fix typos in Foo scaladoc""

So in the future I should put the [Docs] in the pull request? Is that what you meant?

[srowen]

Yes, seems OK to me. Just put [DOCS] in the title, still, as a matter of practice.

[sarutak]

Thanks @lockwobr ! Merged this to master and branch-1.4.
Thanks @rxin , @srowen for your assist!