help:describe should be way more helpful when no arguments are provided
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Key: MPH-29
URL: http://jira.codehaus.org/browse/MPH-29
Project: Maven 2.x Help Plugin
Issue Type: Improvement
Reporter: Dan Fabulich
Right now if you "mvn help:describe" with no further arguments you get an
error: "You must either specify 'groupId' and 'artifactId', or a valid 'plugin'
parameter."
The people who are using help:describe don't necessarily know how help:describe
works yet; if they did, they might be clever enough to use "mvn help:describe
-Dplugin=help -Dmojo=describe" to figure out how help:describe works.
This error message should be more like a paragraph long, and should include
valid working examples. It could be copied from the apt doc for the help
plugin.
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