duplicated HTML anchors on page for git diff

[mast-eu]

The page https://git-scm.com/docs/git-diff contains two options

• --color-moved[=<mode>] (link) and
• --color-moved-ws=<modes> (link),

which have both a parameter no.

The HTML anchor for both parameters is identical: https://git-scm.com/docs/git-diff#Documentation/git-diff.txt-no
The link leads to --color-moved=no. It is impossible to link directly to --color-moved-ws=no, because this is the second occurrence of the anchor within the same page.

#987 describes the same issue on another page.

[peff]

Yes as #987 hints at, I don't think we can fix this without rewriting how the anchors are added, because the current regex doesn't know about the hierarchy of items. I think we'd need to integrate more with asciidoc's view of the document, like the suggestion from asciidoctor/asciidoctor#2717.