Remove trailing whitespace to prevent whitespace in translations.

[s3gfaultx]

Whitespace characters were inadvertantly added in previous PR and now appear in translations. This PR simply just removes the offending whitespace characters.

[viachaslavic]

If I'm not mistaken, the main file is intl/msg_hash_us.h. Perhaps, in this case, it is advisable to change all files at once, to prevent regeneration already translated strings into empty ones. Something like:

sed -i 's/   $//g' intl/msg_hash_*.h

[s3gfaultx]

Good catch and good idea, opened a new PR with those changes.