test: cover wttrin-debug.el and expand lint to all source files

I added 24 unit tests across six new files for wttrin-debug.el. They cover enable/disable, the debug-log writer, clear-log, show-log, and the mode-line diagnostic dump. That lifts wttrin-debug.el coverage from 27% to 95%, and overall coverage from 84% to 94%. Each function gets Normal / Boundary / Error categories where applicable. Globals like `wttrin-debug` and `wttrin--debug-log` are isolated per test with let-bindings. The dynamic-scope rebinding restores state cleanly at exit.

I expanded the `lint` target to run on all three source files instead of just `wttrin.el`. Checkdoc and elisp-lint run on every file. Package-lint stays scoped to `wttrin.el` because the others aren't standalone packages.

The tricky bit: `elisp-lint-file` re-runs package-lint internally as one of its validators. So the explicit guard alone wasn't enough. The fix binds `elisp-lint-ignored-validators` to include "package-lint" for the secondaries, which suppresses the re-run at the validator level.

I also added `*-autoloads.el` to .gitignore. Eask generates `emacs-wttrin-autoloads.el` during install, and it shouldn't be tracked.

I skipped one function: `wttrin--debug-mode-line-info` is a one-line dispatcher to `debug-wttrin-mode-line`. Testing it would assert the dispatch happened, which only tests Emacs.

1 files changed, 23 insertions, 16 deletions

diff --git a/Makefile b/Makefile
index 846fdb5..f80a494 100644
--- a/Makefile
+++ b/Makefile
@@ -280,22 +280,29 @@ compile:
 	@echo "[v] Compilation complete"
 
 lint:
-	@echo "Running linters on $(MAIN_FILE)..."
-	@$(EASK_EMACS) \
-		--eval "(progn \
-			(require 'checkdoc nil t) \
-			(require 'package-lint nil t) \
-			(require 'elisp-lint nil t) \
-			(find-file \"$(MAIN_FILE)\") \
-			(when (featurep 'checkdoc) \
-				(message \"-- checkdoc --\") \
-				(checkdoc-current-buffer t)) \
-			(when (featurep 'package-lint) \
-				(message \"-- package-lint --\") \
-				(package-lint-current-buffer)) \
-			(when (featurep 'elisp-lint) \
-				(message \"-- elisp-lint --\") \
-				(elisp-lint-file \"$(MAIN_FILE)\")))" || true
+	@echo "Running linters on source files..."
+	@for src in $(SOURCE_FILES); do \
+		echo "  Linting $$src..."; \
+		$(EASK_EMACS) \
+			--eval "(let ((src \"$$src\") (main \"$(MAIN_FILE)\")) \
+				(require 'checkdoc nil t) \
+				(require 'package-lint nil t) \
+				(require 'elisp-lint nil t) \
+				(find-file src) \
+				(when (featurep 'checkdoc) \
+					(message \"-- checkdoc on %s --\" src) \
+					(checkdoc-current-buffer t)) \
+				(when (and (featurep 'package-lint) (string= src main)) \
+					(message \"-- package-lint on %s --\" src) \
+					(package-lint-current-buffer)) \
+				(when (featurep 'elisp-lint) \
+					(message \"-- elisp-lint on %s --\" src) \
+					(let ((elisp-lint-ignored-validators \
+							(if (string= src main) \
+								elisp-lint-ignored-validators \
+								(cons \"package-lint\" elisp-lint-ignored-validators)))) \
+						(elisp-lint-file src))))" || true; \
+	done
 	@echo "[i] Lint complete (informational)"
 
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