I want to merge lines that share common prefix. Example:
a 1
a 2
a-b 3
a-b 4
a-b 5
After merging:
a 1 2
a-b 3 4 5
The prefix is a string with hypens
I want to merge lines that share common prefix. Example:
a 1
a 2
a-b 3
a-b 4
a-b 5
After merging:
a 1 2
a-b 3 4 5
The prefix is a string with hypens