add_empty_word(): Add a commented out word printout
add_empty_word(): Add a commented out word printout

Can be used to see the words to which an empty-word connector is added.
Example for Russian:

Before the recent change of selective empty-word connector addition:
Сбоку холма появилось новое отверстие.
add_empty_word: Processing 'сбоку^Ce'
add_empty_word: Processing 'EMPTY-WORD^Czzz'
add_empty_word: Processing 'появилось^Cvp'
add_empty_word: Processing 'EMPTY-WORD^Czzz'
add_empty_word: Processing '.'

After it:
add_empty_word: Processing 'сбоку^Ce'
add_empty_word: Processing 'появилось^Cvp'

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