Inserting multiline text from file to another file after pattern

Question

I have files like:

text2insert
filewithpattern

and also known:

pattern

How

Answer 1

awk 'FNR==NR{      a[c++]=$0;next     }
/pattern1/{g=1;next}
/pattern2/{g=0;next}
g{ 
  for(i=1;i<=c;i++){
    print a[i]
  }
}' text2insert filewithpattern

And why do you need "garbage" in your output? Your previous question seems not to include "garbage"

Answer 2

sed -e '/pattern/r text2insert' filewithpattern