Name
escape_sgml_chars — escape special SGML characters in a string.
Synopsis
::rivet::escape_sgml_chars  ?string?
Description
			    Scans through each character in the specified string looking
			    for any special (with respect to SGML, and hence HTML) characters
			    from the specified string, and returns the result.  
			    For example, the right angle bracket is escaped to the corrected
	          ampersand gt symbol.