Fixed 2 bugs.
1) When incrementing stanza_num, I set the stanza_num to the entire line, which included all the whitespaces as well. This resulted in the chorus not being identified because " Chorus " != "Chorus". Fixed by using line.strip() instead of line when incrementing stanza_num
2) The last verse was not being returned because the loop terminates without returning it. I extracted verse creation into a helper method and called it both when we've reached the end of a stanza and when we're done with the loop
no longer return 400 for empty request. Also changed all hard coded strings in SearchSong.py to use constants
Added new lines and quotes to empty result error message