giostream: Fix some typos in the GIOStream documentation
giostream: Fix some typos in the GIOStream documentation

This doesn’t change the meaning of the documentation.

https://bugzilla.gnome.org/show_bug.cgi?id=735754

tchakabam/glib,tchakabam/glib,endlessm/glib,MathieuDuponchelle/glib,cention-sany/glib,ieei/glib,ieei/glib,johne53/MB3Glib,endlessm/glib,cention-sany/glib,cention-sany/glib,MathieuDuponchelle/glib,tchakabam/glib,MathieuDuponchelle/glib,ieei/glib,endlessm/glib,MathieuDuponchelle/glib,johne53/MB3Glib,Distrotech/glib,johne53/MB3Glib,MathieuDuponchelle/glib,ieei/glib,johne53/MB3Glib,mzabaluev/glib,Distrotech/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,Distrotech/glib,tchakabam/glib,cention-sany/glib,endlessm/glib,Distrotech/glib,Distrotech/glib,ieei/glib,mzabaluev/glib,mzabaluev/glib,mzabaluev/glib,mzabaluev/glib,cention-sany/glib,tchakabam/glib