fix(docs): strip backticks from Section 5 verbatim EXIT STATUS/ARGUMENTS lines

Section 5 (function manpages) is pandoc-rendered verbatim, so a backtick
there is a literal character on the page, not markup. Nine EXIT STATUS/
ARGUMENTS lines across check_fish_deps, lock, cleanup, claude-pr,
claude-docs, dops, ports, screensleep, and steam-dl quoted a command with
backticks; reworded to plain text matching each function's own DESCRIPTION
style.

Fixes docs/verify-manual.py's test_concat_section_five_stays_verbatim,
failing in CI since before this branch (pre-existing on main, confirmed
against the commit before PR #133 merged).

functions/check_fish_deps.fish

@@ -12,7 +12,7 @@
 #   report which fish shell dependencies are installed or missing.
 #
 # EXIT STATUS
-#   Exit status of `fish-deps status`
+#   Exit status of fish-deps status
 #
 # EXAMPLE
 #   check_fish_deps

functions/claude-docs.fish

@@ -13,7 +13,7 @@
 #   obsolete content.
 #
 # EXIT STATUS
-#   Exit status of the `claude` invocation
+#   Exit status of the claude invocation
 #
 # EXAMPLE
 #   claude-docs

functions/claude-pr.fish

@@ -13,7 +13,7 @@
 #   pull request with a manual verification checklist.
 #
 # EXIT STATUS
-#   Exit status of the `claude` invocation
+#   Exit status of the claude invocation
 #
 # EXAMPLE
 #   claude-pr

functions/cleanup.fish

@@ -13,7 +13,7 @@
 #
 # EXIT STATUS
 #   0        No orphans found, or orphans removed successfully
-#   Nonzero  `sudo pacman -Rns` failed
+#   Nonzero  sudo pacman -Rns failed
 #
 # EXAMPLE
 #   cleanup

functions/dops.fish

@@ -16,10 +16,10 @@
 #   columns. Extra arguments (e.g. -a) are forwarded to docker ps.
 #
 # ARGUMENTS
-#   args...  Arguments forwarded to `docker ps`
+#   args...  Arguments forwarded to docker ps
 #
 # EXIT STATUS
-#   Exit status of `docker ps`
+#   Exit status of docker ps
 #
 # EXAMPLE
 #   dops

functions/lock.fish

@@ -11,7 +11,7 @@
 #   Locks the current desktop session using loginctl lock-session.
 #
 # EXIT STATUS
-#   Exit status of `loginctl lock-session`
+#   Exit status of loginctl lock-session
 #
 # EXAMPLE
 #   lock

functions/ports.fish

@@ -12,7 +12,7 @@
 #   port numbers and addresses without hostname resolution.
 #
 # EXIT STATUS
-#   Exit status of `lsof`
+#   Exit status of lsof
 #
 # EXAMPLE
 #   ports

functions/screensleep.fish

@@ -12,7 +12,7 @@
 #   PowerDevil "Turn Off Screen" global shortcut via busctl.
 #
 # EXIT STATUS
-#   Exit status of `busctl`
+#   Exit status of busctl
 #
 # EXAMPLE
 #   screensleep

functions/steam-dl.fish

@@ -12,7 +12,7 @@
 #   or sleeping during active downloads.
 #
 # EXIT STATUS
-#   Exit status of `steam` (via systemd-inhibit)
+#   Exit status of steam (via systemd-inhibit)
 #
 # EXAMPLE
 #   steam-dl