====== AWK - Delete trailing whitespace and tabs from the end of each line ======

<code bash>
awk '{ sub(/[ \t]+$/, ""); print }' file.txt
</code>

----

===== Example =====

<file bash file.txt>
aaaaa
    bbbbb
        ccccc
 ddddd

       eeeee
</file>

returns:

<code bash>
aaaaa
    bbbbb
        ccccc
 ddddd

       eeeee
</code>