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You can use sed: sed 's/ //' file > newfile or, if you want the changes to be made directly to the original file, you can use the -i command line flag - either along with a backup file sed -i.bak 's/ //' file or without creating a backup if you prefer sed -i 's/ //' file
This works: caret.line.back=#FFFFFF caret.line.back.alpha=0 in User Options File or else.
You can search for text in nano using Ctrl W. Alt W (or Esc, W) will repeat the find. (Alternatively, leaving the box blank will default to the last text searched for.) Pressing Ctrl R while in the Find prompt will activate Replace mode. (Sadly, Ctrl W does't seem to work while in nano's Ctrl G help screen..)
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