Add new Version property to handle joined version numbers (#2062)

* Add new version property to handle joined version numbers

* Add unit test for new joined property

* Add documentation on version.up_to() and version.joined

var/spack/repos/builtin/packages/lrslib/package.py

@@ -33,10 +33,6 @@ class Lrslib(Package):
     homepage = "http://cgm.cs.mcgill.ca/~avis/C/lrs.html"
     url      = "http://cgm.cs.mcgill.ca/~avis/C/lrslib/archive/lrslib-062.tar.gz"
 
-    def url_for_version(self, version):
-        return ("http://cgm.cs.mcgill.ca/~avis/C/lrslib/archive/lrslib-%s.tar.gz" %
-                ('0' + str(version).replace('.', '')))
-
     version('6.2', 'be5da7b3b90cc2be628dcade90c5d1b9')
     version('6.1', '0b3687c8693cd7d1f234a3f65e147551')
     version('6.0', 'd600a2e62969ad03f7ab2f85f1b3709c')
@@ -51,6 +47,10 @@ def url_for_version(self, version):
 
     patch("Makefile.spack.patch")
 
+    def url_for_version(self, version):
+        url = "http://cgm.cs.mcgill.ca/~avis/C/lrslib/archive/lrslib-0{0}.tar.gz"
+        return url.format(version.joined)
+
     def install(self, spec, prefix):
         # The Makefile isn't portable; use our own instead
         makeargs = ["-f", "Makefile.spack",