Code formatting

Note, these guidelines do not cover:

third-party code imported into the source tree, which is covered by the guidelines for the upstream projects
released schema files which would require re-releasing if changed by reindenting

All languages

Use spaces to indent; do not ever use tabs

Java

All Java code is formatted with:

an indentation size of two spaces
braces use the Java variant of K&R style

XML

All XML code is formatted with:

an indentation size of two spaces
attributes on multiple lines aligned vertically after the element name.