Help me please ^^

If I use these command in bash shell:

    echo 'abc' | sed 's/b*/1/g'

It would display:

    1a1c1

But when I try it in VIM:

    (open a document, turn into edit mode and simply type 'abc', and then turn into command mode)

    :s/b*/1/g

it would display:

    1a1c

I'm wondering why I get different results(no 1 at the tail when using VIM) through the same way (basic regular expression)...

I think /b*/ would match the null string between 'c' and '$', and a substitution would be taken (just like what 'sed' done above).

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