Fix package docstrings, #1612

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

@@ -26,6 +26,11 @@
 
 
 class Antlr(Package):
+    """ANTLR (ANother Tool for Language Recognition) is a powerful parser
+    generator for reading, processing, executing, or translating structured
+    text or binary files. It's widely used to build languages, tools, and
+    frameworks. From a grammar, ANTLR generates a parser that can build and
+    walk parse trees."""
 
     homepage = "http://www.antlr.org"
     url      = "https://github.com/antlr/antlr/tarball/v2.7.7"