[sr-dev] [kamailio/kamailio] textops: Behavior of function search_append_body(re, txt) (#882)

Hi Guys,

I am not sure if this is an intention behavior of this function but when We use it as below:

`search_append_body("^c=IN.+$", "b=AS:750");`

The result is:

`c=IN IP4 192.168.178.30b=AS:750`

What we were expecting is that the new parameter was appended in the new line like:

``` c=IN IP4 192.168.178.30 b=AS:750 ```

A workaround we have to do is:

`search_append_body("^c=IN.+$", "\r\nb=AS:750"); `

So we think it should be fix in source code since the expected behavior is always the same.

Cheers,