libdl.sh.at: Enhance 'dl_meta get apis' honours 4th argument test
libdl.sh.at: Enhance 'dl_meta get apis' honours 4th argument test

This involves:
  - Add a detailed description
  - Move expected output from AT_DATA() invocation to 3rd argument of
  - Drop leading '#'s from tag emissions

donkarlos/libdl-sh