diff --git a/data/helpers.d/filesystem b/data/helpers.d/filesystem
index cb838e35a..3a7d6da25 100644
--- a/data/helpers.d/filesystem
+++ b/data/helpers.d/filesystem
@@ -77,7 +77,6 @@ ynh_backup() {
         ynh_print_warn --message="Source path '${src_path}' does not exist"
         if [ "$not_mandatory" == "0" ]
         then
-
                 # This is a temporary fix for fail2ban config files missing after the migration to stretch.
                 if echo "${src_path}" | grep --quiet "/etc/fail2ban"
                 then
diff --git a/data/helpers.d/print b/data/helpers.d/print
index f1120367a..468c41e96 100644
--- a/data/helpers.d/print
+++ b/data/helpers.d/print
@@ -192,6 +192,7 @@ ynh_print_ON () {
 # | arg: -m, --message= - The text to print
 # | arg: -w, --weight=  - The weight for this progression. This value is 1 by default. Use a bigger value for a longer part of the script.
 # | arg: -t, --time=    - Print the execution time since the last call to this helper. Especially usefull to define weights.
+# The execution time is given for the duration since the previous call. So the weight should be applied to this previous call.
 # | arg: -l, --last=    - Use for the last call of the helper, to fill te progression bar.
 #
 # Requires YunoHost version 3.?.? or higher.
@@ -223,9 +224,9 @@ ynh_script_progression () {
 	local weight_calls=$(grep --perl-regexp --count "^[^#]*ynh_script_progression.*(--weight|-w )" $0)
 
 	# Get the weight of each occurrences of 'ynh_script_progression' in the script using --weight
-	local weight_valuesA="$(grep --perl-regexp "^[^#]*ynh_script_progression.*--weight" $0 | sed 's/.*--weight[= ]\([[:digit:]].*\)/\1/g')"
-	# Get the weight of each occurrences of 'ynh_script_progression' in the script using -w
-	local weight_valuesB="$(grep --perl-regexp "^[^#]*ynh_script_progression.*-w " $0 | sed 's/.*-w[= ]\([[:digit:]].*\)/\1/g')"
+        local weight_valuesA="$(grep --perl-regexp "^[^#]*ynh_script_progression.*--weight" $0 | sed 's/.*--weight[= ]\([[:digit:]]*\).*/\1/g')"
+        # Get the weight of each occurrences of 'ynh_script_progression' in the script using -w
+        local weight_valuesB="$(grep --perl-regexp "^[^#]*ynh_script_progression.*-w " $0 | sed 's/.*-w[= ]\([[:digit:]]*\).*/\1/g')"
 	# Each value will be on a different line.
 	# Remove each 'end of line' and replace it by a '+' to sum the values.
 	local weight_values=$(( $(echo "$weight_valuesA" | tr '\n' '+') + $(echo "$weight_valuesB" | tr '\n' '+') 0 ))