[BUG] fix: semantic error in skip duplicated

[Lincyaw]

The default operations in gocloc will consider the same files as only one file, which will leads to confusion.

And I find the flag is wrong.

[hhatto]

Thank you for your pull-request.

First off, by default, gocloc prevents the same content files (checked by md5 checksum) from being counted multiple times. The original purpose of providing the --skip-duplicated option is to skip this duplication check and count even the duplicated ones.

Considering the above, I think the option name --skip-duplicated does not reflect the intended behavior.

Instead of merging this change, I think it would be better to change the option name. For instance, how about changing it to --include-duplicates?

[deasa]

Hi there! I just came across this as well and was confused because I expected skip-duplicated to not include duplicated files in the output.
Which direction is this going to go? Renaming the flag, or changing the code behavior?