use HTML anchors for config parameters

this avoids incorrect rendering on the man pages, since `lowdown`
neither parses the anchor syntax nor HTML.

this should rather be fixed in lowdown, as adding more anchors
would otherwise produce ever more noise and error-prone repetition.

doc/manual/generate-options.nix

@@ -9,7 +9,7 @@ let
     let
       inherit (optionsInfo.${name}) description documentDefault defaultValue aliases;
       result = squash ''
-          - [`${name}`]{#conf-${name}}
+          - <span id="conf-${name}">[`${name}`](#conf-${name})</span>
 
           ${indent "  " body}
         '';

doc/manual/src/command-ref/nix-build.md

@@ -53,16 +53,18 @@ All options not listed here are passed to `nix-store
 --realise`, except for `--arg` and `--attr` / `-A` which are passed to
 `nix-instantiate`.
 
-  - [`--no-out-link`]{#opt-no-out-link}\
+  - <span id="opt-no-out-link">[`--no-out-link`](#opt-no-out-link)<span>
+
     Do not create a symlink to the output path. Note that as a result
     the output does not become a root of the garbage collector, and so
-    might be deleted by `nix-store
+    might be deleted by `nix-store --gc`.
-                    --gc`.
+
+  - <span id="opt-dry-run">[`--dry-run`](#opt-dry-run)</span>
 
-  - [`--dry-run`]{#opt-dry-run}\
     Show what store paths would be built or downloaded.
 
-  - [`--out-link`]{#opt-out-link} / `-o` *outlink*\
+  - <span id="opt-out-link">[`--out-link`](#opt-out-link)</span> / `-o` *outlink*
+
     Change the name of the symlink to the output path created from
     `result` to *outlink*.
 

doc/manual/src/command-ref/nix-store.md

@@ -22,7 +22,8 @@ This section lists the options that are common to all operations. These
 options are allowed for every subcommand, though they may not always
 have an effect.
 
-  - [`--add-root`]{#opt-add-root} *path*\
+  - <span id="opt-add-root">[`--add-root`](#opt-add-root)</span> *path*
+
     Causes the result of a realisation (`--realise` and
     `--force-realise`) to be registered as a root of the garbage
     collector. *path* will be created as a symlink to the resulting