make dist: cleanup τεχ files before copying

Makefile

@@ -99,6 +99,8 @@ dist: distclean
 	mkdir i3-${VERSION}/docs
 	# Pre-generate documentation
 	make -C docs
+	# Cleanup τεχ output files
+	find docs -regex ".*\.\(aux\|out\|log\|toc\|bm\|dvi\|log\)" -exec rm '{}' \;
 	find docs -maxdepth 1 -type f ! \( -name "*.xcf" -or -name "*.svg" \) -exec cp '{}' i3-${VERSION}/docs \;
 	# Only copy source code from i3-input
 	mkdir i3-${VERSION}/i3-input