fixed more whitespaces for preprocess.py
fixed more whitespaces for preprocess.py

carolFrohlich/nipype,blakedewey/nipype,glatard/nipype,sgiavasis/nipype,iglpdc/nipype,JohnGriffiths/nipype,arokem/nipype,mick-d/nipype_source,carlohamalainen/nipype,rameshvs/nipype,glatard/nipype,dgellis90/nipype,carolFrohlich/nipype,pearsonlab/nipype,pearsonlab/nipype,grlee77/nipype,sgiavasis/nipype,iglpdc/nipype,iglpdc/nipype,JohnGriffiths/nipype,mick-d/nipype,carlohamalainen/nipype,rameshvs/nipype,FCP-INDI/nipype,FCP-INDI/nipype,carolFrohlich/nipype,mick-d/nipype_source,arokem/nipype,dmordom/nipype,glatard/nipype,FCP-INDI/nipype,sgiavasis/nipype,mick-d/nipype,mick-d/nipype_source,blakedewey/nipype,wanderine/nipype,blakedewey/nipype,gerddie/nipype,christianbrodbeck/nipype,gerddie/nipype,sgiavasis/nipype,wanderine/nipype,iglpdc/nipype,grlee77/nipype,carolFrohlich/nipype,grlee77/nipype,rameshvs/nipype,fprados/nipype,dmordom/nipype,gerddie/nipype,dgellis90/nipype,FredLoney/nipype,arokem/nipype,mick-d/nipype,rameshvs/nipype,carlohamalainen/nipype,arokem/nipype,FCP-INDI/nipype,Leoniela/nipype,blakedewey/nipype,Leoniela/nipype,JohnGriffiths/nipype,wanderine/nipype,FredLoney/nipype,pearsonlab/nipype,dgellis90/nipype,christianbrodbeck/nipype,dmordom/nipype,Leoniela/nipype,gerddie/nipype,wanderine/nipype,mick-d/nipype,pearsonlab/nipype,JohnGriffiths/nipype,grlee77/nipype,dgellis90/nipype,fprados/nipype,FredLoney/nipype,fprados/nipype,glatard/nipype