"save session filename" (no suffix) gives traceback

[Elaine Meng]

As I understand it there are 3 ways to specify saving a session:

save session filename
save filename.cxs
save filename format ses

The second two work, the first one gives a traceback:

save session ~/Desktop/test2
Traceback (most recent call last):
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/cmd_line/tool.py", line 148, in execute
cmd.run(cmd_text)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/commands/cli.py", line 2245, in run
result = ci.function(session, kw_args)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/commands/save.py", line 199, in save_no_model
save(session, None, filename, kw)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/commands/save.py", line 64, in save
fmt, fname, compress = io.deduce_format(filename, open = False, save = True)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/io.py", line 235, in deduce_format
stripped, compression = determine_compression(filename)
File "/Users/chimera/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/chimerax/core/io.py", line 407, in determine_compression
if filename.endswith(compression):
AttributeError: 'NoneType' object has no attribute 'endswith'

[Tom Goddard]

Fixed.