Fixes sourceForge bug: When assertEquals(Object expected, Object actual) is failed, it outputs: java.lang.AssertionError: expected:<XXX> but was:<YYY>. assertNull(Object) could use the same message: expected:<null> but was:<YYY>.
Fixes sourceForge bug:
When assertEquals(Object expected, Object actual) is failed, it outputs:
java.lang.AssertionError: expected:<XXX> but was:<YYY>.
assertNull(Object) could use the same message: expected:<null> but
was:<YYY>.

Signed-off-by: dsaff <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@saff.net>

rws-github/junit,Thothius/junit,JoaquinSiabra/junit,remus32/junit,hhariri/junit,paulduffin/junit,avandeursen/junit,eamonnmcmanus/junit,JoaquinSiabra/junit,remus32/junit,jordancheah/junit,UnimibSoftEngCourse1516/lab2-es3-s.ravetta,MattiasBuelens/junit,y-kt/junit,adko-pl/junit,kobe73er/MyUnit,0359xiaodong/junit,arjenw/junit,Siddartha07/junit,UrsMetz/junit,ashleyfrieze/junit,baev/junit,panchenko/junit,powazny/junit4,VikingDen/junit,edwardmlyte/junit,UnimibSoftEngCourse1516/lab2-es3-s.renzo,UnimibSoftEngCourse1516/lab2-es3-m.vella6,rwarren14/junit,laercioferracini/junit,UnimibSoftEngCourse1516/lab2-es3-i.pigazzini,UnimibSoftEngCourse1516/lab2-es3-l.salvestrini,UnimibSoftEngCourse1516/lab2-es3-i.pigazzini,yusuke/junit,JoaquinSiabra/junit,eamonnmcmanus/junit,sposam/junit,moinuddin14/junit,mekwin87/junit4,nathanchen/JUnitCodeReading,jhfjhfj1/junit,onesfreedom/junit,junit-team/junit,schauder/junit,nathanchen/JUnitCodeReading,1234-/junit,MichaelJY91/junit,kcooney/junit-test,yusuke/junit,panchenko/junit,UnimibSoftEngCourse1516/lab2-es3-m.polonioli,onesfreedom/junit,hansjoachim/junit,0359xiaodong/junit,AxelMonroyX/junit4,UnimibSoftEngCourse1516/lab2-es3-m.polonioli,UnimibSoftEngCourse1516/lab2-es3-f.spinardi,VikingDen/junit,freezhan/junit,kcooney/junit,kobe73er/MyUnit,MingxuanChen/junit,alb-i986/junit,UnimibSoftEngCourse1516/lab2-es3-f.giannini3,quentin9696/junit,1234-/junit,mekwin87/junit4,rwarren14/junit,edwardmlyte/junit,openhardnudd/junit,UnimibSoftEngCourse1516/lab2-es3-m.vella6,sposam/junit,mekwin87/junit4,slezier/junit,UnimibSoftEngCourse1516/lab2-es3-a.tundo,moinuddin14/junit,vorburger/junit,remus32/junit,marcphilipp/junit,jhfjhfj1/junit,vorburger/junit,UnimibSoftEngCourse1516/lab2-es3-e.nani1,Clairebi/JUnit-Clone,UnimibSoftEngCourse1516/lab2-es3-f.cirelli1,cherryleer/junit,UnimibSoftEngCourse1516/lab2-es3-a.tundo,powazny/junit4,larrychen1990/junit,stefanbirkner/junit,julien-sobczak/junit,chrisvest/junit,UnimibSoftEngCourse1516/lab2-es3-f.cirelli1,MingxuanChen/junit,feisuo/junit,UnimibSoftEngCourse1516/lab2-es3-f.giannini3,MichaelJY91/junit,slezier/junit,arjenw/junit,UnimibSoftEngCourse1516/lab2-es3-a.mosini,UrsMetz/junit,hansjoachim/junit,songfj/junit,y-kt/junit,witcxc/junit,UnimibSoftEngCourse1516/lab2-es3-e.nani1,stefanbirkner/junit,UnimibSoftEngCourse1516/lab2-es3-a.tundo,adko-pl/junit,quentin9696/junit,GeeChao/junit,sposam/junit,UnimibSoftEngCourse1516/lab2-es3-m.polonioli,vorburger/junit,julien-sobczak/junit,nathanchen/JUnitCodeReading,easyMan-zzy/junit,UnimibSoftEngCourse1516/lab2-es3-i.pigazzini,UnimibSoftEngCourse1516/lab2-es3-l.salvestrini,alohageck0/junit,junit-team/junit4,flomotlik/junit,openhardnudd/junit,GeeChao/junit,slezier/junit,alohageck0/junit,UnimibSoftEngCourse1516/lab2-es3-m.scarpone,feisuo/junit,hansjoachim/junit,paulduffin/junit,mnk/junit,junit-team/junit,baev/junit,onesfreedom/junit,UnimibSoftEngCourse1516/lab2-es3-m.scarpone,panchenko/junit,smayoorans/junit,MingxuanChen/junit,Thothius/junit,flomotlik/junit,freezhan/junit,jordancheah/junit,songfj/junit,eamonnmcmanus/junit,avandeursen/junit,kobe73er/dUnit,schauder/junit,mekwin87/junit4,yusuke/junit,MattiasBuelens/junit,ashleyfrieze/junit,cherryleer/junit,alohageck0/junit,moinuddin14/junit,UnimibSoftEngCourse1516/lab2-es3-e.nani1,larrychen1990/junit,Siddartha07/junit,MichaelJY91/junit,ashleyfrieze/junit,alb-i986/junit,easyMan-zzy/junit,edwardmlyte/junit,Thothius/junit,rwarren14/junit,UnimibSoftEngCourse1516/lab2-es3-s.ravetta,janocat/junit,Clairebi/JUnit-Clone,rws-github/junit,smayoorans/junit,powazny/junit4,UnimibSoftEngCourse1516/lab2-es3-s.renzo,kcooney/junit,UnimibSoftEngCourse1516/lab2-es3-o.sertori,UnimibSoftEngCourse1516/lab2-es3-a.mosini,jhfjhfj1/junit,laercioferracini/junit,mnk/junit,paulduffin/junit,dvberkel/junit,elijah513/junit,stefanbirkner/junit,elijah513/junit,baev/junit,hhariri/junit,UrsMetz/junit,kobe73er/dUnit,Clairebi/JUnit-Clone,avandeursen/junit,chrisvest/junit,cherryleer/junit,MattiasBuelens/junit,openhardnudd/junit,Siddartha07/junit,arjenw/junit,kcooney/junit,dvberkel/junit,UnimibSoftEngCourse1516/lab2-es3-s.renzo,smayoorans/junit,larrychen1990/junit,UnimibSoftEngCourse1516/lab2-es3-a.mosini,y-kt/junit,freezhan/junit,VikingDen/junit,rws-github/junit,arjenw/junit,UnimibSoftEngCourse1516/lab2-es3-f.giannini3,MattiasBuelens/junit,UnimibSoftEngCourse1516/lab2-es3-s.ravetta,hhariri/junit,songfj/junit,GeeChao/junit,marcphilipp/junit,jordancheah/junit,easyMan-zzy/junit,janocat/junit,flomotlik/junit,vorburger/junit,marcphilipp/junit,kcooney/junit-test,rws-github/junit,mnk/junit,UnimibSoftEngCourse1516/lab2-es3-f.spinardi,UrsMetz/junit,kcooney/junit-test,UnimibSoftEngCourse1516/lab2-es3-m.scarpone,kobe73er/MyUnit,nathanchen/JUnitCodeReading,UnimibSoftEngCourse1516/lab2-es3-m.vella6,kobe73er/dUnit,UnimibSoftEngCourse1516/lab2-es3-l.salvestrini,rws-github/junit,schauder/junit,UnimibSoftEngCourse1516/lab2-es3-f.spinardi,chrisvest/junit,junit-team/junit4,UnimibSoftEngCourse1516/lab2-es3-o.sertori,laercioferracini/junit,AxelMonroyX/junit4,quentin9696/junit,dvberkel/junit,UnimibSoftEngCourse1516/lab2-es3-o.sertori,julien-sobczak/junit,junit-team/junit,witcxc/junit,adko-pl/junit,feisuo/junit,1234-/junit,junit-team/junit4,elijah513/junit,witcxc/junit,0359xiaodong/junit,UnimibSoftEngCourse1516/lab2-es3-f.cirelli1,AxelMonroyX/junit4,janocat/junit,alb-i986/junit