I Agree :)

Yeah! The Kata's Valid. I wrote some unnecessary code which resulted in undesired outputs

not an issue with the kata
(and there are no quotes in your input string)

I think there is an issue !
My code Failed for the following test case:

solution('pears lemons\n? apples oranges cherries\napples oranges lemons oranges pears\npears cherries apples cherries ?',
["'", ',', '?', '=', '#', '.'])

My solution :-
'\n\napples oranges lemons oranges pears\npears cherries apples cherries'

Expected solution :-
'pears lemons\n\napples oranges lemons oranges pears\npears cherries apples cherries'

Isn't "'"(single quote) a comment marker ? I'm Confused