Choice 1: Imagine to write a big text with breaklines in a textbox inside construct 2.
Choice 2: Now, the same text you can write in a .txt file on windows right? <-- Here is coming ajax plugin in case you want to insert in construct 2.
Now you have a button.. Click and search for a "character, number whatever" inside your text.
So this code, a regex code maybe to remove all the line of the "character, number whatever" and 1-2 (maybe 5-10) lines above and 1-2 (maybe 5-10) lines below.
Hope you understand now! ; -)
Sorry, i edit my code example above.. You can see now!