* Added length unit conversions
Conversion of length units were added with respective tests being implemented and passed.
Available Units:- Metre,Kilometre,Feet,Inch,Centimeter,Yard,Foot,Mile,Millimeter
* Formatted File
File was formatted to go as per repo rules
* Reformatted file
* Reformatted code once again
* Added more test
Added test to evaluate whether the code handles wrong arguements passed
* Update length_conversions.py
* Update length_conversions.py
* Update length_conversions.py
* Update length_conversions.py
* Update length_conversions.py
* Update length_conversions.py
* Update length_conversions.py
* Fixed Minor errors in test
One of the test was failing and it was fixed
Co-authored-by: Christian Clauss <cclauss@me.com>
