Fixed formatting with colons issue#2183
test file for checking coordinate colon issue
Update angle_utilities.py

Added spaces after comma
Updated CHANGES.rst for coordinates formatting
Merge branch 'master' of https://github.com/QuanTakeuchi/astropy
Added test to check formatting with colon
Delete test_colon.py
Undo added test_colon

Adding the test to test_formatting.py instead
Adding test_to_string_fields_colon
Used nested ifs
Merge pull request #2197 from QuanTakeuchi/master

Issue with formatting coordinates with colons #2183