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sed is a great tool for that:

                           # substitute ("s/")
sed -e 's/^[[:blank:]]*//  # parts of lines that start ("^")  with a space/tab 
        s/[[:blank:]]*$//' # or end ("$") with a space/tab
                           # with nothing (/)

You can use it for your case be either piping in the text, e.g.

cat file | sed -e 's/^{{...

or by acting on it 'inline' -

sed -i 's/...' file

but changing the source this way is "dangerous" as it may be unrecoverable when it doesn't work right (or even when it does!), so backup first!

sed is a great tool for that:

                        # substitute ("s/")
sed 's/^[[:blank:]]*//; # parts of lines that start ("^")  with a space/tab 
     s/[[:blank:]]*$//' # or end ("$") with a space/tab
                        # with nothing (/)

You can use it for your case be either piping in the text, e.g.

<file sed -e 's/^[[...

or by acting on it 'inline' if your sed is the GNU one:

sed -i 's/...' file

but changing the source this way is "dangerous" as it may be unrecoverable when it doesn't work right (or even when it does!), so backup first (or use -i.bak which also has the benefit to be portable to some BSD seds)!

sed is a great tool for that:

                           # substitute ("s/")
sed -e 's/^[[:blank:]]*//  # parts of lines that start ("^")  with a space/tab 
        s/[[:blank:]]*$//' # or end ("$") with a space/tab
                           # with nothing (/)

sed is a great tool for that:

                           # substitute ("s/")
sed -e 's/^[[:blank:]]*//  # parts of lines that start ("^")  with a space/tab 
        s/[[:blank:]]*$//' # or end ("$") with a space/tab
                           # with nothing (/)

You can use it for your case be either piping in the text, e.g.

cat file | sed -e 's/^{{...

or by acting on it 'inline' -

sed -i 's/...' file

but changing the source this way is "dangerous" as it may be unrecoverable when it doesn't work right (or even when it does!), so backup first!

sed is a great tool for that:

sed -e 's/^[[:blank:]]*//  # Lines that start ("^")  with a space/tab 
        s/[[:blank:]]*$//' # lines that end ("$") with a space/tab

sed is a great tool for that:

                           # substitute ("s/")
sed -e 's/^[[:blank:]]*//  # parts of lines that start ("^")  with a space/tab 
        s/[[:blank:]]*$//' # or end ("$") with a space/tab
                           # with nothing (/)