Update package documentation.

README.md

@@ -12,22 +12,26 @@ output; all these macros can only be used with a specific “TeX engine” each.
 The present `pwebmac` package integrates these three WEB macro files similar
 to `cwebmac.tex` in Silvio Levy's and Don Knuth's
 [CWEB](https://ctan.org/pkg/cweb) system, so `pwebmac.tex` can be used with
-“plain TeX,” “pdfTeX,” and “XeTeX” alike.
+“plain TeX,” “pdfTeX,” and “XeTeX” alike. And it adds full support for Martin
+Ruckert's “[HiTeX](https://ctan.org/pkg/hitex)” engine and its `HINT` output
+format.
 
-Its initial application is the production of PDF files for all major WEB
-programs for “TeX and friends” as distributed in
+Its initial application is the production of PDF and HINT files for all major
+WEB programs for “TeX and friends” as distributed in
 [TeX Live](https://www.tug.org/texlive).  For this purpose, the shell script
 `makeall` was whipped together; it provides various commandline options and
 works around several “quirks” in the WEB sources.  The resulting collection
-of PDF documents can be browsed in the `knuth-pdf` package.
+of PDF documents can be browsed in the `knuth-pdf` package amd the collection
+of HINT documents are available in the `knuth-hint` package.
 
 WEB programmers who want to use `pwebmac.tex` instead of the default
 `webmac.tex` in their programs have to change the first line in the TeX file
 created by `weave`.  From there, all depends on the “TeX engine” you use:
 “plain TeX” by default creates DVI output, “plain TeX” with the invocation
 `tex "\let\pdf+\input…"`, `pdftex`, and `xetex` create PDF output with
-clickable links and bookmarks (depending on your PDF viewer).
+clickable links and bookmarks (depending on your PDF viewer), and `hitex`
+creates HINT output that can be viewed with the `hintview` program.
 
 The `pwebmac` package is free software and may be used without constraints.
 
-This is version “4.6.4” of the `pwebmac` package — 2021-11-06, Andreas Scherer.
+This is version “4.7” of the `pwebmac` package — 2022-02-05, Andreas Scherer.