-a-b-c-
Put hyphens everywhere.
Start file
abcdefghijklm
End file
-a-b-c-d-e-f-g-h-i-j-k-l-m-
View Diff
1c1 < abcdefghijklm --- > -a-b-c-d-e-f-g-h-i-j-k-l-m-
Solutions by @_bruab_:
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