convert: make contents of "extra" dict available from sources, for sinks.
This breaks hash preservation for hg->hg conversion, as each converted
change gets a convert_revision item added to its extra dict. Ugh.
#!/bin/sh
# basic test for hg debugrebuildstate
hg init repo
cd repo
touch foo bar
hg ci -Am 'add foo bar'
touch baz
hg add baz
hg rm bar
echo '% state dump'
hg debugstate | cut -b 1-16,35- | sort
echo '% status'
hg st -A
hg debugrebuildstate
echo '% state dump'
hg debugstate | cut -b 1-16,35- | sort
echo '% status'
hg st -A