Narrows the whitespace around the cursor — or cursors — to a single space. Or expands if there is no whitespace.
Does one of two things, depending on whether the cursor is at the beginning of a line (not counting indentation):
When it is not: Like inserting a line break, except the other way around: The text to the left of the cursor ends up on the line below, and text to the right on the line above.
When it is: It does the reverse. Thus the command can be used repeatedly to cycle between two states.
Shows (or hides) some Unicode information about the character at the cursor.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.