Found indentation with tabs instead of spaces

[Egor Kostan]

Codacy detected an issue:

Message: Found indentation with tabs instead of spaces

Occurred on:

• Commit: d2dee50
• File: kyu_4/sum_of_intervals/sum_of_intervals.py
• LineNum: 69
• Code: if i[0] == b[0] and b[1] < i[1]:

Currently on:

• Commit: de4dda2
• File: kyu_4/sum_of_intervals/sum_of_intervals.py
• LineNum: 69