Issue #21729: Used the "with" statement in the dbm.dumb module to ensure
files closing.  Patch by Claudiu Popa.
Issue #21811: Anticipated fixes to 3.x and 2.7 for OS X 10.10 Yosemite.
Issue #21811: Anticipated fixes to 2.7 configure for OS X 10.10 Yosemite.
Issue #18592: For idlelib.SearchDialogBase, edit and add docstrings,
move two functions next to the functions that use them.