fixed typo in comment

brain_perfusion/pve/sim2.sh

 #!/bin/bash
 #: Title      : Simple simulation on the effect of PVE on radiowater PET
-#: Date       : 2019-03-30
+#: Date       : 2019-03-31
 #: Author     : "Vesa Oikonen" <vesa.oikonen@utu.fi>
 #: Options    : None
 
@@ -88,7 +88,7 @@ if [ $? -ne 0 ] ; then printf "Failed!\n" ; exit 1 ; fi
 tacren sim2/mixed40.tac 0 @_W60_@
 if [ $? -ne 0 ] ; then printf "Failed!\n" ; exit 1 ; fi
 
-printf "\n 20-to-40 \n"
+printf "\n 20-to-80 \n"
 taccalc sim2/gm.tac x 0.20 sim2/temp1.tac
 if [ $? -ne 0 ] ; then printf "Failed!\n" ; exit 1 ; fi
 taccalc sim2/wm.tac x 0.80 sim2/temp2.tac