Use the new debug_level() macro in remove_empty_words()
Use the new debug_level() macro in remove_empty_words()

Print function name. Shorten Info message.
Also change the debug verbosity level to a macro.

linas/link-grammar,ampli/link-grammar,ampli/link-grammar,opencog/link-grammar,MadBomber/link-grammar,linas/link-grammar,ampli/link-grammar,ampli/link-grammar,MadBomber/link-grammar,linas/link-grammar,MadBomber/link-grammar,linas/link-grammar,opencog/link-grammar,opencog/link-grammar,MadBomber/link-grammar,ampli/link-grammar,MadBomber/link-grammar,MadBomber/link-grammar,ampli/link-grammar,MadBomber/link-grammar,opencog/link-grammar,opencog/link-grammar,opencog/link-grammar,linas/link-grammar,ampli/link-grammar,linas/link-grammar,opencog/link-grammar,linas/link-grammar,MadBomber/link-grammar,opencog/link-grammar,ampli/link-grammar,opencog/link-grammar,linas/link-grammar,ampli/link-grammar,linas/link-grammar