regex - split multiple samecharacters onto their own line -


i tried this

sed -r "s/]]/]\n]/g" testfile.txt

but don't think worked.

what i'm trying do:

take

[[[sometext

would be

[ [ [sometext

or

[[[[[[[[sometext

would be

[ [ [ [ [ [ [ [sometext

using grep -o easier using sed:

s='[[[[[[[[sometext'  grep -o '\[[^[]*' <<< "$s" [ [ [ [ [ [ [ [sometext

if have use sed use:

sed 's/\[[^[]*/&\n/g' <<< "$s" [ [ [ [ [ [ [ [sometext

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