Three small typos

line 14 : to contain all points from the origin layer.  ----> 'origin' should be 'original'

line 30 : Since the selction is not  ----> 'selction' should be 'selection'

line 32 : only a geoalgorithm algorithms can be ----> double wording, 'algorithms' can be left out

There was also one double spacing somewhere, but I can't find it anymore :(  ( Fixed it though)