docs(functions): merge remaining manual prose into function headers

Folds the last seven manual entries whose description exceeded their header
back into the source-of-truth comment blocks: config-settings (Sponge/Paths
page detail, list-value parsing, width tiers, navigation keys), fish-deps
(install-method priority, dependency tiers), logs (fzf keybindings, ov
viewer behavior), kitty-logging (symlink wording, C5 inert-vs-uninstalled),
config-update (exec fish reload), yt-dlp (C1 guard). Drops duplicate example
lines left by the previous merge.

functions/repo-open.fish

@@ -42,9 +42,6 @@
 #   repo-open              # open current branch (+ subdir) in browser
 #   repo-open --print      # just print the URL
 #   repo-open --root       # repo home page for the current branch
-#   repo-open
-#   repo-open --print
-#   repo-open --root
 #
 # NOTES
 #   Typo abbreviation: open-repo (expands to repo-open on space/enter).