Remove duplicate help target

And reformat for using existing help-text helper

Fixes #1979

Makefile

@@ -15,34 +15,25 @@ GRUNT_DOCKER_NAME:=galaxy/client-builder:16.01
 all: help
 	@echo "This makefile is primarily used for building Galaxy's JS client. A sensible all target is not yet implemented."
 
-help:
-	@echo "client - rebuild all client artifacts"
-	@echo "docs - generate Sphinx HTML documentation, including API docs"
-	@echo "open-docs - generate Sphinx HTML documentation and open in browser"
-	@echo "open-project - open project on github"
-	@echo "lint - check style using tox and flake8 for Python 2 and Python 3"
-	@echo "release-check-metadata - check github PR metadata for target release"
-	@echo "release-bootstrap-history - bootstrap history for a new release"
-
-docs:
+docs: ## generate Sphinx HTML documentation, including API docs
 	$(IN_VENV) $(MAKE) -C docs clean
 	$(IN_VENV) $(MAKE) -C docs html
 
 _open-docs:
 	open docs/_build/html/index.html || xdg-open docs/_build/html/index.html
 
-open-docs: docs _open-docs
+open-docs: docs _open-docs ## generate Sphinx HTML documentation and open in browser
 
-open-project:
+open-project: ## open project on github
 	open $(PROJECT_URL) || xdg-open $(PROJECT_URL)
 
-lint:
+lint: ## check style using tox and flake8 for Python 2 and Python 3
 	$(IN_VENV) tox -e py27-lint && tox -e py34-lint
 
 release-issue:
 	$(IN_VENV) python scripts/bootstrap_history.py --create-release-issue $(RELEASE_CURR)
 
-release-check-metadata:
+release-check-metadata: ## check github PR metadata for target release
 	$(IN_VENV) python scripts/bootstrap_history.py --check-release $(RELEASE_CURR)
 
 release-check-blocking-issues:
@@ -51,7 +42,7 @@ release-check-blocking-issues:
 release-check-blocking-prs:
 	$(IN_VENV) python scripts/bootstrap_history.py --check-blocking-prs $(RELEASE_CURR)
 
-release-bootstrap-history:
+release-bootstrap-history: ## bootstrap history for a new release
 	$(IN_VENV) python scripts/bootstrap_history.py --release $(RELEASE_CURR)
 
 npm-deps:
@@ -66,7 +57,7 @@ style: npm-deps ## Calls the style task of Grunt
 webpack: npm-deps ## Pack javascript
 	cd client && node_modules/webpack/bin/webpack.js -p
 
-client: grunt style webpack ## Process all client-side tasks
+client: grunt style webpack ## Rebuild all client-side artifacts
 
 grunt-docker-image: ## Build docker image for running grunt
 	docker build -t ${GRUNT_DOCKER_NAME} client