replace `tr` by shell's IFS
replace `tr` by shell's IFS

cehoffman/pyenv,blueyed/pyenv,syndbg/goenv,yyuu/pyenv,rowhit/pyenv,yeonsh/pyenv,chenfengyuan/pyenv,lozybean/pyenv,hlecuanda/pyenv,dongguangming/pyenv,fly19890211/pyenv,cehoffman/pyenv,recruit-mtl/pyenv,sebhahn/pyenv,syndbg/goenv,sebhahn/pyenv,pyenv/pyenv,BanzaiMan/pyenv,xshwy/pyenv,syndbg/goenv,chenfengyuan/pyenv,dnsd/pyenv,lozybean/pyenv,takluyver/pyenv,obimod/pyenv,takluyver/pyenv,xshwy/pyenv,kevinburke/pyenv,habinmusic/pyenv,zmwangx/pyenv,yyuu/pyenv,obimod/pyenv,VShangxiao/pyenv,genome-vendor/pyenv,pyenv/pyenv,yeonsh/pyenv,recruit-mtl/pyenv,lepture/pyenv,syndbg/goenv,genome-vendor/pyenv,dnsd/pyenv,hlecuanda/pyenv,zmwangx/pyenv,sebhahn/pyenv,UCASREN/pyenv,VShangxiao/pyenv,dongguangming/pyenv,fly19890211/pyenv,habinmusic/pyenv,BanzaiMan/pyenv,pyenv/pyenv,UCASREN/pyenv,kevinburke/pyenv,rowhit/pyenv,lepture/pyenv