Added unit test for the selection normalization bug at the end of text nodes.
Added unit test for the selection normalization bug at the end of text nodes.

danielpunkass/tinymce,endjin/tinymce,ChristophKaser/tinymce,sachgits/tinymce,support-dot-com/tinymce,nikolas/tinymce,leofeyer/tinymce,danchr/tinymce,toxalot/tinymce,simachewh/tinymce,gencer/tinymce,shilpi230/tinymce,ice8lue/tinymce,collective/tinymce,MediehusetTek/tinymce,nbcp/tinymce,FernCreek/tinymce,enfold/tinymce,rxl194/tinymce,M4R7iNP/tinymce,tinymce/tinymce,support-dot-com/tinymce,sachgits/tinymce,pmpl-5/tinymce,fashionsun/tinymce,VioletLife/tinymce,tinymce/tinymce,kencheung/tinymce,Kindling/tinymce,adaptiffdesigns/tinymce,shilpi230/tinymce,blakewallan/tinymce,danchr/tinymce,nbcp/tinymce,Zimbra/tinymce,fhchina/tinymce,rbecheras/tinymce,gabixdev/tinymce,ETSI-CTI/TinySpecMCE,ice8lue/tinymce,VioletLife/tinymce,jashua212/tinymce,widgetfactory/tinymce,jtark/tinymce,collective/tinymce,howanghk/tinymce,gencer/tinymce,mplank/tinymce,rednose-public/tinymce,pmpl-5/tinymce,bsuh/tinymce,ikuchmin/tinymce,Zimbra/tinymce,TeamupCom/tinymce,rednose-public/tinymce,simachewh/tinymce,rbecheras/tinymce,leofeyer/tinymce,ChristophKaser/tinymce,mplank/tinymce,danielpunkass/tinymce,dziemian007/tinymce,nikolas/tinymce,fashionsun/tinymce,rxl194/tinymce,aduth/tinymce,dziemian007/tinymce,Shopify/tinymce,henrythewasp/tinymce,kencheung/tinymce,fhchina/tinymce,1099511627776/tinymce,Kindling/tinymce,M4R7iNP/tinymce,blakewallan/tinymce,cclaerhout/tinymce,bsuh/tinymce,enfold/tinymce,adaptiffdesigns/tinymce,henrythewasp/tinymce,howanghk/tinymce,jashua212/tinymce,1099511627776/tinymce,jtark/tinymce,ikuchmin/tinymce,fillabs/TinySpecMCE,Razzwan/tinymce,sjbufton/tinymce,fillabs/TinySpecMCE,danielpunkass/tinymce,aduth/tinymce,tinymce/tinymce,gabixdev/tinymce,endjin/tinymce,toxalot/tinymce,FernCreek/tinymce,TeamupCom/tinymce,Razzwan/tinymce,widgetfactory/tinymce,sjbufton/tinymce,ETSI-CTI/TinySpecMCE,MediehusetTek/tinymce,FernCreek/tinymce,cclaerhout/tinymce