How do i replace all tabs with one space using sed?

[hawksbill]

Man page to sed: https://www.lightnetics.com/post/3334

The sample file has tabs as shown by the ^I characters.

This is my first IP 10.50.20.1
grapes
apples
pears
This^I^I^Iis the first block
oranges
PLUMS

This is my second IP 10.50.20.2
This is my duplicate IP 10.50.20.2
grapes
apples
pears
This is the second block
oranges
PLUMS

This is my third IP 10.50.20.3
grapes
apples
pears
This is the third block
oranges
plums

This command replaces the tabs with three spaces, but that's not what we want, we want just one space for any amount of tabs.

$ sed 's/\t/ /g' samplefile

This command will replace all tabs with one space.

$ sed 's/[[:space:]]\+/ /g' samplefile