much more efficient SequenceBuilder.sequence()
more explicit impl of Iterable.sequence()
ws
fix bugs in Array span() and segment() + add tests
optimize Range.includes(), fix bug in List.includes()
Merge branch 'master' into SBsequence
Add Iterable.spread()
add default type arg
getFromFirst returns null, not finished.
add List.append(), and fix some confusion with following() vs
withLeading()
add String.pad()/padLeft()/padRight()
Merge branch 'master' into SBsequence
fix and test String.pad() and friends
oops, fix default args
xrefs
minor changes
add List.extend()
refine a bunch more operations on Empty
ws
addList.prepend() and make some return types more precise