Fix breaking lines at a space in the last column

I don't understand what the `&& lastWhitespaceIndex+1 != i` condition was added
for; I can't see a reason for it. Removing it fixes the problem.

Granted, it's not a serious problem, not even a cosmetic one as the space is not
visible. Still, it's cleaner and less confusing this way.

Author: stefanhaller

view.go

@@ -1512,7 +1512,7 @@ func lineWrap(line []cell, columns int) [][]cell {
 				lines = append(lines, line[offset:i])
 				offset = i
 				n = rw
-			} else if lastWhitespaceIndex != -1 && lastWhitespaceIndex+1 != i {
+			} else if lastWhitespaceIndex != -1 {
 				// if there is a space in the line and the line is not breaking at a space/hyphen
 				if line[lastWhitespaceIndex].chr == '-' {
 					// if break occurs at hyphen, we'll retain the hyphen

view_test.go

@@ -230,10 +230,7 @@ func TestLineWrap(t *testing.T) {
 			line:    "hello world",
 			columns: 6,
 			expected: []string{
-				/* EXPECTED:
 				"hello",
-				ACTUAL: */
-				"hello ",
 				"world",
 			},
 		},