[SPARK-3401][PySpark] Wrong usage of tee command in python/run-tests

Author: Kousuke Saruta <sarutak@oss.nttdata.co.jp>

Closes #2272 from sarutak/SPARK-3401 and squashes the following commits:

2b35a59 [Kousuke Saruta] Modified wrong usage of tee command in python/run-tests

(cherry picked from commit 4feb46c5feca8d48ec340dc9c8d0eccbcd41f505)
Signed-off-by: Reynold Xin <rxin@apache.org>
[Docs] fix minor MLlib case typo

Also make the list of features consistent in style.

Author: Nicholas Chammas <nicholas.chammas@gmail.com>

Closes #2278 from nchammas/patch-1 and squashes the following commits:

56df319 [Nicholas Chammas] [Docs] fix minor MLlib case typo

(cherry picked from commit 6a37ed838b3cbf96f7a904f3d3dabf99141729f5)
Signed-off-by: Xiangrui Meng <meng@databricks.com>