In [http://www.tug.org/TUGboat/Articles/tb25-1/thanh.pdf Micro-typographic Extensions of pdfTEX in Practice] Hàn Thé Thành, University of Education, Ho Chi Minh City, Vietnam, calls it “Margin Kerning.”
:Indented line ''Margin kerning is the term used for slight shifting of certain characters at the mar-margins so the margins look smooth. This technique is sometimes called hanging punctuation, as it is useful mostly for punctuation marks such as comma, period and the like. However, margin kerning is a more general concept, as it can be usefully applied to certain letters as well.''
gins so the margins look smooth. This technique is sometimes called hanging punctuation, as it is useful mostly for punctuation marks such as comma, period and the like. However, margin kerning is a more general concept, as it can be usefully applied to certain letters as well.
