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9c52568e - libtextstyle: Add a second argument to the 'flush' operations.

libtextstyle: Add a second argument to the 'flush' operations. * gnulib-local/lib/ostream.oo.h (ostream_flush_scope_t): New type. (ostream::flush): Add scope parameter. * gnulib-local/lib/file-ostream.oo.c: Include <unistd.h>, <termios.h>. (file_ostream::flush): Add a scope parameter. * gnulib-local/modules/file-ostream (Depends-on): Add 'fsync'. (configure.ac): Check for tcdrain. * gnulib-local/lib/fd-ostream.oo.c: Include <unistd.h>, <termios.h>. (fd_ostream::flush): Add a scope parameter. (fd_ostream::free): Update flush call. * gnulib-local/modules/fd-ostream (Depends-on): Add 'fsync'. (configure.ac): Check for tcdrain. * gnulib-local/lib/term-ostream.oo.c: Include <unistd.h>, <termios.h>. (term_ostream::flush): Add scope parameter. (term_ostream::free): Update flush call. * gnulib-local/m4/term-ostream.m4 (gl_TERM_OSTREAM): Check for tcdrain. * gnulib-local/modules/term-ostream (Depends-on): Add 'fsync'. * gnulib-local/lib/memory-ostream.oo.c (memory_ostream::flush): Add scope parameter. * gnulib-local/lib/iconv-ostream.oo.c (iconv_ostream::flush): Add scope parameter. * gnulib-local/lib/html-ostream.oo.c (html_ostream::flush): Add scope parameter. Emit closing </span> tags. * gnulib-local/lib/fd-styled-ostream.oo.c (fd_styled_ostream::flush): Add scope parameter. * gnulib-local/lib/term-styled-ostream.oo.c (term_styled_ostream::flush): Add scope parameter. * gnulib-local/lib/html-styled-ostream.oo.c (html_styled_ostream::flush): Add scope parameter. * libtextstyle/lib/textstyle.h (ostream_flush_scope_t): New type. (ostream_flush, styled_ostream_flush, file_ostream_flush, fd_ostream_flush, term_ostream_flush, memory_ostream_flush, iconv_ostream_flush, html_ostream_flush, term_styled_ostream_flush, html_styled_ostream_flush): Add scope parameter. * libtextstyle/doc/libtextstyle.texi (The ostream class): Add scope parameter to flush method. * libtextstyle/NEWS: Mention the change.