Improve empty collection check in add_collection.
Add test for add_collection
Fix sign of infstr in exceltools.rec2exel
PEP8 fixes on the line module
PEP8 fixes on lines
Added back imports in lines for backward compatibility
PEP8 replaced trailing backslash with temporary variable
PEP8 Renamed temporary variable
In macosx backend, move the coordinate message closer to the icons, to reduce clipping by the window edge.
Fix problems related to streamplot in boilerplate.py
add default savefig directory
replace tabs with spaces
explicitly missing key or empty str signals to use cwd
PEP8
Implement savefig.directory for tk gui
fix comment in gtk FileChooserDialog: does *not* remember last selected file/directory
Implement savefig.directory for gtk gui
Implement savefig.directory for gtk3 gui
Update CHANGELOG with savefig.directory feature
Split line