* use %s in translations strings
* merge simmilar error strings
* i18n: use sprintf() in translation strings to make them easier to understand for translators
* i18n: remove sprintf() function from translation string with unused parameter
* i18n: move colons and brackets into the translation strings
* revert comit addaa5d
* Fix broken sprintf()
* i18n: move colons into the translation strings on error messages
* Fix Travis-CI Error: operator must be surrounded by a single space
f27499b501