Configuration:
- PDF.js version: 2.0.550

Steps to reproduce the problem:
1. Render document in SVG mode `renderMode="svg"`

What is the expected behavior? (add screenshot)
Rendering annotations same way as they rendered on canvas

What went wrong? (add screenshot)
```
Warning: Unimplemented operator beginAnnotations
Warning: Unimplemented operator endAnnotations
```
lastSpacePosInStringStart = start;
          lastSpacePosInStringEnd = end;
          lastSpacePos = i;
        }
      } else {
        if (currentWidth + glyphWidth > width) {
          
          if (lastSpacePosInStringStart !== -1) {
            chunks.push(line.substring(startChunk, lastSpacePosInStringEnd));
            startChunk = lastSpacePosInStringEnd;
            i = lastSpacePos + 1;
            lastSpacePosInStringStart = -1;
            currentWidth = 0;
          } else {
            
            chunks.push(line.substring(startChunk, start));
            startChunk = start;
            currentWidth = glyphWidth;
          }
        } else {
          currentWidth += glyphWidth;
        }
      }
    }
    if (startChunk < line.length) {
      chunks.push(line.substring(startChunk, line.length));
    }
    return chunks;
  }
  getFieldObject() {