[SPARK-8531] [ML] Update ML user guide for MinMaxScaler

[hhbyyh]

jira: https://issues.apache.org/jira/browse/SPARK-8531

Update ML user guide for MinMaxScaler

[SparkQA]

Test build #36492 has finished for PR 7211 at commit a0725a5.

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

[SparkQA]

Test build #39525 has finished for PR 7211 at commit 40942a7.

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

[jkbradley]

good catch!

[jkbradley]

Would you mind adding an example for Python too? Or we can make that a separate PR if you prefer.

[SparkQA]

Test build #40741 has finished for PR 7211 at commit b6ac0fc.

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

[hhbyyh]

@jkbradley Thanks for the review.
I'm not sure if the latex part looks good.
And for python document, since python interface for MinMaxScaler is still under review, so I didn't add the example.

[jkbradley]

The links are not generated correctly, but you can fix it by modifying this line:

<div data-lang="scala" markdown="1">

[jkbradley]

The latex part looks much better now.

[jkbradley]

ping!

[hhbyyh]

Sorry for the delay. I am in my hometown and has poor internet connection. I'll be back to office tomorrow and start catching up.

[SparkQA]

Test build #41489 has finished for PR 7211 at commit 1622f85.

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

[jkbradley]

Thank you for updating it. LGTM.
Merging with master and branch-1.5