[cleanup] cleanup scripts/coordinate_import.py
[cleanup] cleanup scripts/coordinate_import.py

- use str.format(...) instead of modulo for type specifier
  arguments.
- use single quotes for string literals
- remove preleading "u" from strings

Change-Id: I81745c3d1315c42795cd447a0c5d9f616a869872

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core