Add index entries around each paragraph rather than depend on entries
from beginning of node. Doing so ensures that index entries are less
likely to be forgotten if text is cut and pasted, and are necessary
anyway if the references are on a separate page. It seems that
makeinfo is now (v. 4.8) only producing one index entry per node, so
there is no longer any excuse not to. Use subheading instead of
heading. The incorrect use of heading produced very large fonts in
Info--as large as the main heading.
(From Bill Wohler): MH-E never did appear in Emacs 21--MH-E versions 6
and 7 appeared *around* the time of these Emacs releases.