任意の数のファイルから最初の列を抽出し、欠落しているエントリのために空の行で列を出力する必要があります。空行部分に問題があります。そのようです:
File1:
Alfa Something More stuff
Charlie Something More stuff
Delta Something More stuff
Echo Something More stuff
Foxtrot Something More stuff
File2:
Alfa Something More stuff
Bravo Something More stuff
Echo Something More stuff
Foxtrot Something More stuff
File3:
Alfa Something More stuff
Bravo Something More stuff
Charlie Something More stuff
Delta Something More stuff
Echo Something More stuff
Output:
FileName1 FileName2 FileName3
========= ========= =========
Alfa Alfa Alfa
Bravo Bravo
Charlie Charlie
Delta Delta
Echo Echo Echo
Foxtrot Foxtrot