[~] $ echo ';gurkan@linuks.mine.nu;NOID;Gürkan Sengün;aclock.app agenda.app batmon.app biococoa.app briquolo brutalchess camera.app cddb.bundle cenon-doc cenon.app charmap.app connect.app cynthiune.app dd2 dillo displaycalibrator.app easydiff.app edenmath.app foremost freebsd-manpages ftp.app gifsicle gnumail-doc gnustep-examples# gnustep-icons gnustep-tutorial gnuwash.app gomoku.app gorm.app gridlock.app gtamsanalyzer.app gworkspace# helpviewer.app' | sed -e 's/\([^ ]*#\)/ /g'
;gurkan@linuks.mine.nu;NOID;Gürkan Sengün;aclock.app agenda.app batmon.app biococoa.app briquolo brutalchess camera.app cddb.bundle cenon-doc cenon.app charmap.app connect.app cynthiune.app dd2 dillo displaycalibrator.app easydiff.app edenmath.app foremost freebsd-manpages ftp.app gifsicle gnumail-doc   gnustep-icons gnustep-tutorial gnuwash.app gomoku.app gorm.app gridlock.app gtamsanalyzer.app   helpviewer.app

[~] $ echo "gnustep-examples# and gworkspace# need be removed" | sed -e 's/\([^ ]\+#\)//g'
 and  need be removed

[~] $ echo ';gurkan@linuks.mine.nu;NOID;Gürkan Sengün;aclock.app agenda.app batmon.app biococoa.app briquolo brutalchess camera.app cddb.bundle cenon-doc cenon.app charmap.app connect.app cynthiune.app dd2 dillo displaycalibrator.app easydiff.app edenmath.app foremost freebsd-manpages ftp.app gifsicle gnumail-doc gnustep-examples# gnustep-icons gnustep-tutorial gnuwash.app gomoku.app gorm.app gridlock.app gtamsanalyzer.app gworkspace# helpviewer.app' | sed -e 's/\([^ ]\+#\)/ /g'
;gurkan@linuks.mine.nu;NOID;Gürkan Sengün;aclock.app agenda.app batmon.app biococoa.app briquolo brutalchess camera.app cddb.bundle cenon-doc cenon.app charmap.app connect.app cynthiune.app dd2 dillo displaycalibrator.app easydiff.app edenmath.app foremost freebsd-manpages ftp.app gifsicle gnumail-doc   gnustep-icons gnustep-tutorial gnuwash.app gomoku.app gorm.app gridlock.app gtamsanalyzer.app   helpviewer.app

[~] $ sed --version
GNU sed version 4.1.4
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law.