Add spell checker as Makefile target.

This patch adds the `make spell` command so developers can easily
check the spelling on docstrings and comments. False positives
words should be added to spell.ignore file.
Signed-off-by: NAmador Pahim <apahim@redhat.com>

Makefile

@@ -32,6 +32,7 @@ all:
 	@echo "link:       Runs 'python setup.py --develop' in all subprojects and links the needed resources"
 	@echo "clean:      Get rid of scratch, byte files and removes the links to other subprojects"
 	@echo "selfcheck:  Runs tree static check, unittests and functional tests using Avocado itself"
+	@echo "spell:      Runs spell checker on comments and docstrings (requires python-enchant)"
 	@echo
 	@echo "Package requirements related targets"
 	@echo "requirements:            Install runtime requirements"
@@ -173,6 +174,9 @@ link: develop
 		do AVOCADO_DIRNAME=$(AVOCADO_DIRNAME) make -C $$MAKEFILE link &>/dev/null && echo ">> LINK $$MAKEFILE" || echo ">> SKIP $$MAKEFILE";\
 	done
 
+spell:
+	pylint --errors-only --disable=all --enable=spelling --spelling-dict=en_US --spelling-private-dict-file=spell.ignore * && echo OK
+
 man: man/avocado.1 man/avocado-rest-client.1
 
 .PHONY: source install clean check link

spell.ignore

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