Add "make _check-deps-readability" target

Author: tkf

Makefile

@@ -7,7 +7,7 @@ ELPA_DIR = \
 .cask/$(shell ${EMACS} -Q --batch --eval '(princ emacs-version)')/elpa
 # See: cask-elpa-dir
 
-.PHONY: test deps clean purge travis-ci
+.PHONY: test deps _check-deps-readability clean purge travis-ci
 
 test: deps
 ${EMACS_TEST} --batch -f ert-run-tests-batch-and-exit
@@ -19,8 +19,12 @@ deps: ${ELPA_DIR}
 ${ELPA_DIR}: Cask
 ${CASK} install
 test -d $@
+${MAKE} _check-deps-readability
 touch $@
 
+_check-deps-readability:
+${EMACS_TEST} --batch
+
 clean:
 rm -f *.elc