chore: coverage, autoload fix, and internal cleanup for org-drill

A batch of test-coverage and hardening work, squashed from the test-work branch.

Tests: deduplicated a colliding leitner-capture test name so make test-name loads again. Added SM2 assert-failure cases, the six basic multicloze variant delegations, the three English-side spanish-verb branches, and org-drill-current-scope branch coverage.

Fix: the entry-point commands (org-drill itself, cram-tree, tree, directory, resume, relearn-item, strip-all-data, merge-buffers) carried no autoload cookies, so M-x failed from a fresh install until something pulled the file in. They're autoloaded now.

Perf: org-drill-shuffle was quadratic because it indexed a list with elt on every swap. It runs a linear Fisher-Yates pass over a vector now, and it checks its argument is a list.

Feat: added org-drill-version, a constant plus an interactive command, so a bug reporter doesn't have to open the file header.

Refactor: extracted org-drill--format-tense-mood, shared by the two verb-conjugation presenters that each carried a copy.

Docs: explained the SM8 magic numbers in the simple8 helpers as empirical fits rather than tunable knobs.

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/test-org-drill-autoloads.el b/tests/test-org-drill-autoloads.el
new file mode 100644
index 0000000..5bfefce
--- /dev/null
+++ b/tests/test-org-drill-autoloads.el
@@ -0,0 +1,47 @@
+;;; test-org-drill-autoloads.el --- Autoload-cookie coverage  -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; The user-facing entry-point commands must carry an `;;;###autoload' cookie
+;; so they work from a fresh package install before org-drill is loaded.
+;; Without it, `M-x org-drill-resume' (etc.) fails with "command not found"
+;; until something pulls the file in.
+;;
+;; This reads the source via `find-library-name' (the .el, not a compiled
+;; .elc which would have the cookies stripped) and checks each command.
+
+;;; Code:
+
+(require 'ert)
+(require 'org-drill)
+
+(defconst test-org-drill-autoloaded-commands
+  '("org-drill"
+    "org-drill-cram"
+    "org-drill-cram-tree"
+    "org-drill-tree"
+    "org-drill-directory"
+    "org-drill-again"
+    "org-drill-resume"
+    "org-drill-relearn-item"
+    "org-drill-strip-all-data"
+    "org-drill-merge-buffers")
+  "Entry-point commands that should be autoloaded.")
+
+(ert-deftest test-org-drill-entry-commands-carry-autoload-cookie ()
+  "Each user-facing entry-point command is preceded by an autoload cookie."
+  (let ((src (with-temp-buffer
+               (insert-file-contents (find-library-name "org-drill"))
+               (buffer-string))))
+    (dolist (cmd test-org-drill-autoloaded-commands)
+      (should (string-match-p
+               (concat ";;;###autoload\n(defun " (regexp-quote cmd) " ")
+               src)))))
+
+(ert-deftest test-org-drill-entry-commands-are-interactive ()
+  "Every command in the autoload list is actually an interactive command."
+  (dolist (cmd test-org-drill-autoloaded-commands)
+    (should (commandp (intern cmd)))))
+
+(provide 'test-org-drill-autoloads)
+
+;;; test-org-drill-autoloads.el ends here