### arithmetic_base_with_suffix_removal
# 10#${var%%-*} should expand then convert
last="0003-assistant.md"
echo $(( 10#${last%%-*} ))
### expect
3
### end

### arithmetic_base_with_prefix_removal
# 10#${var##0} should expand then convert
val="007"
echo $(( 10#${val##0} ))
### expect
7
### end

### arithmetic_base_with_expansion_plus
# 10#${var%%-*} + 1 in arithmetic
seq="0041-user.md"
echo $(( 10#${seq%%-*} + 1 ))
### expect
42
### end

### arithmetic_base_simple_var
# 10#${var} without operators (verify no regression)
x="0099"
echo $(( 10#${x} ))
### expect
99
### end