bug#37195: sed documentation improvement suggestion

[is a]

Hi,

The sed 4.2.2 document states:

i \

       text   Insert text, which has each embedded newline preceded by a
backslash.


I suggest improving the wording here. We have the pattern space, the hold
space, the output stream, the error stream etc. Where are we insert the
text? The POSIX standard states that the text will be inserted into the
output stream. We'd better make it clear here.

Thanks,
Yang Shuai