Add some more unit tests for version comparisons: x.y.z-alphanumeric < x.y.z < x.y.z-numeric and x.y.z-A < x.y.z-B where A is before B in the alphabeth. This was triggered by a user question on the dev list, and took unit tests to answer the question - committing as 'documentation'.
maven/components/trunk/maven-artifact/src/test/java/org/apache/maven/artifact/versioning/DefaultArtifactVersionTest.java