fix coloring in bash

ecma48 clears the data buffer when it emits an event. Bash sets multiple styles/colors in the same commend. So, the 2nd+
events emitted for these multi-style sequences had an empty data list, causing them to be ignored by vterm.

IIRC, the original reason for skipping events with empty Raw data was for a bug that was fixed by rewriting the ecma48
parser.

vterm/stdout.go

@@ -60,10 +60,6 @@ func (v *VTerm) ProcessStdout(input *bufio.Reader) {
 				v.useFastRefresh()
 			}
 
-			if len(output.Raw) == 0 {
-				break
-			}
-
 			// log.Printf(":: %q", output.Raw)
 
 			switch x := output.Parsed.(type) {