#Fill to the line!
Given input consisting of the characters _, , and newline, fill the empty space up to the line!
Example:
I will use # as the filler character in the example.
1. Input
________
2. Fill up to the line, but not above.
________
########
########
########
- You may assume that the input either is rectangular (is padded), or consists only of the line and newlines.
- You may assume that there is only one straight, unbroken line.
Test cases coming soon.