Displaying '#' for symbols in the debugger inspector

[adri09070]

The debugger inspector uses the method Object>>#stDisplayString to display objects in the tree view of the debugger.

Object>>#stDisplayString

	^ StObjectPrinter asTruncatedTextFrom: self

which truncates the string description to 100 characters. This is done by calling the method:

Object>>#displayStringLimitedTo: limit
	"Answer a String whose characters are a description of the receiver.
	If you want to print without a character limit, use fullDisplayString."

	^ self printStringLimitedTo: limit using: [:s | self displayStringOn: s]

which doesn't print # for symbols.

I just override #stDisplayString in the class Symbol to display the character #