fiddle: Fix generation of image links.
fiddle: Fix generation of image links.

BUG=skia:
TBR=hal

Review URL: https://codereview.chromium.org/1904243003

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot