Set default attribute values

When we're building websites (yes, [we do that](, we often have to set an alt attribute value on an image if it doesn't already exist. Up until now, we'd do an if statement or a fancy ternary statement to see if the alt text existed already. If it didn't, then we'd set it in the code. Now, it's even easier. `{% do image.alt.default('Default value') %}`