Check the line links of a side-by-side diff

The links have been written through html_attr since b8adfd6, so with
the percent-encoding dropped a quote came out as an entity the absence
check could not match, and the presence check was met by the file
links above the diff. The test now reads the line links themselves,
for a name holding a hash and a question mark as well.

0 files changed, 0 insertions, 0 deletions