What are the asterisks and colons at the end of names?

[1j01]

There's an asterisk added to instrument names:

JZZ-midi-GM/javascript/JZZ.midi.GM.js

Line 564 in f1d047d

return _instr[n] + ' *';

What is this for?

Also, some instrument names include a colon, e.g. "Cello:"

JZZ-midi-GM/javascript/JZZ.midi.GM.js

Lines 95 to 97 in f1d047d

	{0:"Violin:",1:"Violin Attack:",8:"Slow Violin"},
	{0:"Viola:",1:"Viola Attack:"},
	{0:"Cello:",1:"Cello Attack:"},

Is from formatting the data into code?
Perhaps a regexp replace :"([},]) -> "$1 is in order.

[jazz-soft]

Thanks for asking!
If the instrument in the particular bank is unknown (e.g. user-defined bank), it returns a GM instrument name with an asterisk.
Colon stands for instruments that support "legato".