Move some things around

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+# Emacs
+
+- center/top point when
+    - moving to text/tag search hit
+    - going to man page section
+    - opening eww on an anchor
+    - visiting a function from its Help buffer
+- make font-lock stop background at fill-column or max(len(line) for
+  line in paragraph) rather than window-width when text spans >1 lines
+- shell-mode
+    - add faces instead of reusing font-lock-{comment,string}
+    - understand `autocd` and `cd !$`
+    - use Bash completions (e.g. `ls TAB` in a folder with one file)
+- [.dir-locals changed priorities][bug#30008] between subfolder and
+  major mode from 25 to 26
+- eshell: `ls --group-directories-first` does not color folders
+- eww, gnus-article: adapt filling to window width changes
+- scroll-lock-mode
+    - cursor stuck on lines wrapped by visual-line-mode
+    - cursor stuck on lines with 😛
+    - scroll when going down newline with forward-…
+- matching-paren analysis fails: `;; (here is\n;; a comment)`
+- some modes redefine C-M-h, which makes this binding hard to
+  override; could mark-defun consult functions/values exposed by major
+  modes instead?
+- Man-mode: make isearch skip end-of-line hyphens
+- when opening `.gpg` files in a TTY, some characters (e.g. TAB) are
+  swallowed by Emacs instead of being forwarded to the gpg prompt;
+  these characters are then inserted in the decrypted file's buffer
+  (see `epa-file-insert-file-contents`)
+- let TRAMP fetch Google Drive credentials from .authinfo.gpg
+- icomplete's C-j does not choose the first completion as advertised
+  on empty input; it chooses ".", which AFAICT comes from the fact
+  that icomplete-exhibit calls completion-pcm--filename-try-filter
+  while icomplete-force-complete-and-exit simply calls
+  minibuffer-force-complete-and-exit
+    - likewise, if a folder contains foo.c and foo.o, "C-x C-f foo"
+      hides foo.o, yet C-j completes to foo.o
+- calendar uses default X resources when run in its own frame; see
+  `calendar-frame-parameters`, `x-handle-named-frame-geometry`,
+  `(make-frame '((name . "")))` vs `(make-frame '((title . "")))`
+- use compilation-mode-line-… faces for compilation-num-… indicators
+- "é" is not erased with a single DEL stroke, despite [Unicode
+  conventions]
+- sort tar archive members by name; serving suggestion:
+
+    ``` elisp
+    (defun my/tar-sort (info)
+      (sort info (lambda (a b) (string< (tar-header-name a) (tar-header-name b)))))
+    ;; Apply to tar-parse-info in tar-summarize-buffer.
+    ```
+
+- add a command or minor mode to highlight marks; serving suggestion:
+
+    ``` elisp
+    (save-excursion
+      (dolist (m mark-ring)
+        (goto-char (marker-position m))
+        (pulse-momentary-highlight-region (point) (point-at-eol))
+        (sit-for 0.1)))
+    ```
+
+- StackOverflow-like suggestions when reporting bugs
+- match data vs. `:eval` during redisplay: cf. [bug#31586]
+- make vc honour `.gitignore` so that `project-find-file` completion
+  is not cluttered with ignored files
+- in a folder with a .git folder and a .gitignore file,
+    - `C-x C-f .gi TAB` completes to .gitignore
+    - `C-x C-f .git TAB` says "not unique"
+- add some Custom machinery to save additions/removals to list
+  variables; as things stand, once I add/remove items and save the
+  variable, I miss out on changes to the variable's default value:
+  e.g. `git-commit-setup-hook` recently added `bug-reference-mode`,
+  but I never realized it because I customized the hook to add some
+  personal functions
+- completions in python.el's comint buffer get confused when
+  readline's completion-prefix-display-length is set: candidates
+  become elided, maybe python-shell-completion-native-get-completions
+  is not ready for that?
+- some bindings advertised by `describe-mode` in texinfo-mode are
+  invalid:
+    - `C-c C-s` runs `Texinfo-insert-node` instead of
+      `texinfo-show-structure`
+    - `C-c C-e` runs `Texinfo-environment` instead of being a prefix
+      command for `texinfo-format-{buffer,region}`
+- [bug#31666]: visual-line-mode adds newlines before words that end up
+  being split anyway
+- `gnus-group-make-group` uses `message-y-or-n-p`, which relies on
+  `message-talkative-question`; the message might be too wide for the
+  temporary buffer where it is displayed, and `y-or-n-p` prevents the
+  user from moving to the buffer and looking at the rest of the
+  message.
+
+[bug#30008]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=30008
+[bug#31586]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31586
+[bug#31666]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31666
+[Unicode conventions]: https://lists.gnu.org/archive/html/emacs-devel/2018-07/msg00961.html
+
+## Dired
+
+- allow "columns" to be toggled; more specifically, make it possible
+  to hide ownership, permissions, number of hard links…
+
+- make the filename stand out
+
+- `% r` does not support some `\` constructs (`\#`, `\,`)
+
+- add a face for broken symbolic links
+
+## ERC
+
+- move timestamp to a better position (see `stamp` module)
+- play well with whitespace-mode
+
+## Org
+
+- dissociate sub- and super-script fontification from everything else
+  in org-toggle-pretty-entities
+
+- org-clocktable trips on DST:
+
+    ``` org
+    #+BEGIN: clocktable :scope file :maxlevel 2 :step day :stepskip0 t :tstart "[2018-10-15]" :tend "[2018-11-15]"
+    #+END:
+
+    * foo
+    :LOGBOOK:
+    CLOCK: [2018-10-26 Fri 08:00]--[2018-10-26 Fri 17:00] =>  9:00
+    :END:
+
+    * bar
+    :LOGBOOK:
+    CLOCK: [2018-10-29 Mon 08:00]--[2018-10-29 Mon 17:00] =>  9:00
+    :END:
+    ```
+
+- make org-ctrl-c-ctrl-c call `(org-clock-update-mode-line t)` when
+  point is on the clocked-in heading
+
+- new command `org-clock-in-late` to clock out x minutes ago from
+  previous task, and clock in x ago on task at point
+
+## read-passwd
+
+- prevent kills from ending up in the clipboard
+- add command to temporarily reveal password
+
+## whitespace-mode
+
+- skip line/wrap-prefix variables and properties
+
+- highlights the adaptive-wrap prefix, although weirdly enough the
+  whitespace *faces* are not applied
+
+- in org-indent-mode, adds a spurious (unfaced) space marker before
+  paragraphs; somehow transient-mark-mode knows not to highlight this
+  space, maybe the answer lies there
+
+## Ellipses customization
+
+Make ellipses for "invisible" text easily customizable (src/xdisp.c).
+Make them default to "…" when `(char-displayable-p ?…)`.
+
+Use-cases:
+
+- ibuffer truncation
+- hideshow
+- outline (org)
+- rgrep
+- magit-process
+
+## xref
+
+- search gz-compressed Elisp files when calling `xref-find-references`
+  from an Elisp buffer: from a user perspective, if
+  `xref-find-definitions` can visit those files,
+  `xref-find-references` should work too (even though technically they
+  don't rely on the same mechanisms)
+
+- defun-building macros seem hard to understand for xref: e.g. `M-.`
+  on `rg` does not jump to `rg-define-search rg`
+
+## External libraries
+
+### adaptive-wrap
+
+- a commented-out line with no space between the comment delimiter and
+  its text will get padded with the comment delimiter:
+
+        ;(some very long line)
+        ;; ⇒ wrapped with adaptive-wrap-extra-indent set to 4:
+        ;(some very
+        ;;;;;long line)
+
+### debbugs
+
+- asynchronous bug fetching
+
+### magit
+
+- customize current-tag function so that one can add `--first-parent`
+- prevent section highlight overlay from hiding tag face background
+- when quitting ediff conflict resolution, the "save buffer" prompt is
+  out of focus, one must ALT-TAB out of the ediff control panel first
+  (noticed in Emacs 27; 25.1 works fine); possible culprits:
+    - magit
+    - ediff
+    - smerge
+    - yes-or-no-p
+    - read-answer
+- make status buffer understand and display `typechange` e.g. when
+  replacing a replacing a regular file with a symlink
+- when ignoring a file in a subdirectory, magit attempts to
+  `git add .gitignore` (i.e. toplevel `.gitignore`), which fails
+- if the `-n` log option is set in the status buffer, the "unpulled
+  from origin/…" section shows an invalid commit count if the `-n`
+  limit is lower than the actual number of commits
+- for repos with dozens of old branches, it would be nice to have a
+  way to hide or distinguish "stale" branches from active ones, a la
+  <https://emba.gnu.org/emacs/emacs/branches>
+
+#### transient
+
+- cannot use the full domain of `--find-renames` (e.g. 1%)
+- cannot call transient-save for all transients (e.g. would like to
+  always `fetch --prune`)
+
+### markdown-mode
+
+- support [shortcut reference links]
+- move point past header after C-c C-t !/@
+- update sub-superscript regex to allow L~i+1~
+- make justification work with indented blockquotes
+- add "ini ↦ conf-mode" to markdown-code-lang-modes
+
+[shortcut reference links]: http://spec.commonmark.org/0.27/#shortcut-reference-link
+
+### rg-mode
+
+- make -project DTRT in dired
+
+### page-break-lines
+
+- borked in magit-diff
+
+### diff-hl
+
+- colored fringe line is discontinued on lines featuring faces with
+  heights greater than 1
+
+  ``` shell
+  $ git init
+  $ echo "* foo" > README.org
+  $ git add README.org ; git commit -m README.org README.org
+  $ echo "* bar" >> README.org
+  $ echo "* baz" >> README.org
+  ```
+
+  ``` elisp
+  (load-file "…/diff-hl.el")
+  (global-diff-hl-mode)
+  (set-face-attribute 'org-level-1 nil :height 1.2)
+  (find-file "README.org")
+  ```
+
+- in Org buffers with org-indent-mode, lines before point will "dance"
+  around while editing, i.e. while I type, they stick to the left
+  margin, then when I stop typing, they become indented again.
+
+### wgrep
+
+`C-c C-d` (`wgrep-mark-deletion`) could move to the next line, just
+like `d` moves to the next line in Dired buffers.