Fixes <https://bugs.gnu.org/37846>.
Reported by Christopher Baines <mail@cbaines.net>.
* module/texinfo/plain-text.scm (acronym): New procedure.
(tag-handlers): Change 'acro' handle to ACRONYM, and add 'acronym'
handler.
* test-suite/tests/texinfo.plain-text.test ("stexi->plain-text")
["acronym", "recursive acronym"]: New tests.
* module/texinfo/plain-text.scm (*line-width*): New variable.
(wrap*): Honor it.
* doc/ref/texinfo.texi (texinfo plain-text): Document it.
* test-suite/tests/texinfo.plain-text.test: New file.
* test-suite/Makefile.am (SCM_TESTS): Add it.
* module/Makefile.am (LIB_SOURCES): Add statprof, sxml, and texinfo to
the build.
(NOCOMP_SOURCES): Reindent, and add the upstream SSAX files.
* module/statprof.scm:
* module/sxml/apply-templates.scm:
* module/sxml/fold.scm:
* module/sxml/simple.scm:
* module/sxml/ssax.scm:
* module/sxml/ssax/input-parse.scm:
* module/sxml/transform.scm:
* module/sxml/upstream/COPYING.SSAX:
* module/sxml/upstream/SSAX.scm:
* module/sxml/upstream/SXML-tree-trans.scm:
* module/sxml/upstream/SXPath-old.scm:
* module/sxml/upstream/assert.scm:
* module/sxml/upstream/input-parse.scm:
* module/sxml/xpath.scm:
* module/texinfo.scm:
* module/texinfo/docbook.scm:
* module/texinfo/html.scm:
* module/texinfo/indexing.scm:
* module/texinfo/plain-text.scm:
* module/texinfo/reflection.scm:
* module/texinfo/serialize.scm:
* module/texinfo/string-utils.scm: Add files from guile-lib to Guile.
It's only Richard, Andreas, Rob, and myself that have copyright on
these, and we have all assigned to the FSF. SSAX itself is in the
public domain.