This fixes#713.
If the block before the statement we want to use introduce var on, had empty
lines these empty lines would also be added between the let-statement and
the current line where the new variable is used.
This fixes that by trimming excess newlines from the start of the indent chunk
and simply adding a single newline (when the chunk had newlines) between the
let-statement and the current statement. If there were no newlines this
matches the previous behaviour.
This fixes#758.
Currently we try to maintain the cursor position relative to the statement under
cursor, if the cursor is inside the dbg! macro call.
Meaning:
let foo = dbg!(some.complex<|>().expression());
Should turn into:
let foo = some.complex<|>().expression();
With the cursor staying in place.
