lazutils: fixed replacesubstring append

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47018 4005530d-fff6-0310-9dd1-cebe43e6787f
codetools: added SimpleFormat

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47019 4005530d-fff6-0310-9dd1-cebe43e6787f
tests: SimpleFormat

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@47020 4005530d-fff6-0310-9dd1-cebe43e6787f