@samp{ksh93g} (1998-04-30) but as of 2006 many operating systems were
still shipping older versions with the bug.
-The UnixWare 7.1.4 @command{/usr/bin/posix/sh} can mishandle words in
-here-documents that cross 8 KiB buffer boundaries. The usual workaround
-for this bug is to use another shell.
-
Many older shells (including the Bourne shell) implement here-documents
inefficiently. In particular, some shells can be extremely inefficient when
a single statement contains many here-documents. For instance if your