PR for issue#70 (#98)
PR for issue#70 (#98)

* Force flush for rcutils logging

* Update logging.c

* Fix logging.c as per the review received.

* Remove redundant else case

Also added the name of the environment variable failing in the same function block,

* Clean up the fprintf section

* Update logging.c

* Double check fprintf functions for correct spacing

Apply space for wraped strings inside fprintf.

* add space between two strings

* remove unnecessary quotes

* add space between two strings

ros2/c_utilities,ros2/c_utilities