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Simple optimal text formatter displays in one column with further deletion of leading spaces:

fmt -1 file | column -t

In awk /./ pattern prevents from possible output of the first empty line:

awk '/./' RS='[[:space:]]+' file

Simple optimal text formatter displays in one column with further deletion of leading spaces:

fmt -1 file | column -t

In awk NF prevents from possible output of the first empty line:

awk 'NF' RS='[[:space:]]+' file

Simple optimal text formatter:

fmt -1 file | column -t

Simple optimal text formatter displays in one column with further deletion of leading spaces:

fmt -1 file | column -t

In awk /./ pattern prevents from possible output of the first empty line:

awk '/./' RS='[[:space:]]+' file

Simple optimal text formatter:

fmt -1 file

Simple optimal text formatter:

fmt -1 file | column -t