Inconsistencies in the handling of `public_folder` in image paths: Discrepancies between expectations and results

[lorensansol]

• If I use public_folder: /foo
  • Expectation?: image: /foo/example.jpg
  • Reality: image: /foo/example.jpg ✅
• If I use public_folder: /foo/
  • Expectation?: image: /foo/example.jpg
  • Reality: image: /foo//example.jpg 🆗 It is ok because there is the previous option
• If I use public_folder: ''.
  • Expectation?: image: example.jpg ⬅️ I would especially like this
  • Reality: image: /example.jpg ❌
• If I use public_folder: /
  • Expectation?: image: /example.jpg
  • Reality: image: //example.jpg ❌