The script I provided has a mis-typed comment on line 6. The script should be:
# The behavior of conditionals depends on whitespace
# Source this script to test it
# This formatting works as expected; evaluates the "true" block.
# Result:
# "It is 2" # <=== The original had a typo here, included NOT
#
if { = 2 2 } {
echo "It is 2"
} {
echo "It is NOT 2"
}
# This formatting causes a BUG: both the "true" block and the "false" block are evaluated.
# I tried several combinations, it appears it the "false" block starts on it's own line,
# it is no longer treated a part of the "if" _expression_. Which could be argued
# is expected because there is no "else" that would define whether the second block
# is not part of the "if" _expression_. BUT see next test
#
# Result:
# "It is 3"
# "It is NOT 3"
#
if { = 3 3 } {
echo "It is 3"
}
{
echo "It is NOT 3"
}
# BUT we get the same incorrect result if we place the whole if _expression_ into {}
{
if { = 4 4 } {
echo "It is 4"
}
{
echo "It is NOT 4"
}
}
######################################################################