Sometimes hint output includes a lot of junk

Given:

main = do
    let a = 1
    let a = 2
    let a = 3
    let a = 4
    let a = 5
    let a = 6
    let a = 7
    let a = 8
    let a = 9
    let a = (f 10)
    let a = 11
    let a = 12
    let a = 13
    let a = 14
    let a = 15
    let a = 16
    let a = 17
    let a = 18
    let a = 19
    return ()

The remove bracket hint prints out all the additional a values. That can be a fantastic amount of complex code. A better approach would be to format both the input and the output as the user wrote it, and just include the line above/line below for context. Jumping to a whole expression is excessive.

Reproduce the remove bracket hint using the Haskell snippet in the issue and trace the hint-output entry point. Compare the current output with the source-line context described in the report; done means the hint no longer dumps unrelated bindings while retaining useful nearby context.