Here, there are 7 spaces before "$arg". If this code was written
in an editor with 4-space tabs, it would store it as one tab and
three spaces. Now, if another developer edits the same file in an
editor with 8-space tabs, it will look like this:
printf("%s",
$arg);
Likewise, consider this code written with 8-space tabs:
if ($foo &&
$bar) {
}
If viewed in a 4-space-tab editor, it will look like this:
if ($foo &&
$bar) {
}
In a community like PEAR where people use lots of different
systems and editors, using tabs simply doesn't work. People will
end up doing whitespace commits fixing rendering in their editor,
while breaking it for others.
With only spaces it will look the same to everyone.
