whatsnew/version0.9.txt: Fix '~./ipython' -> '~/.ipython' typo
whatsnew/version0.9.txt: Fix 'mulitple' -> 'multiple' typo
whatsnew/version0.9.txt: Fix 'infromation' -> 'information' typo
Merge pull request #2863 from wking/whatsnew-typo

whatsnew/version0.9.txt: Fix '~./ipython' -> '~/.ipython' typo