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Rollback to Revision 3

edited Mar 17, 2018 at 10:55

Husk, 44 43 41 bytes

|s0J'-x"+-"J'+f¹zμ+↓s²_&ε²¹↑□¹+"x^"s)¹m←ṡ

This feels a bit clunky; Husk is not optimized for string manipulation. I'll try to golf it down. I borrowed some ideas from the Stax answer.

answered Mar 17, 2018 at 9:22