on Win32. This also avoids a header rectangle above the list.

to hold some number of lines. This is an optimization that can decrease
reallocation overhead.

improve performance for client code that called SCI_GETSTATUS after every API to
check for failure.

Replace custom hash code with standard library hash.
Drop standard methods that are not needed.
Restrict representations to 200 bytes. Improve documentation.

provided as an argument instead of from the system clipboard.

representations and support setting a representation for the "\r\n" line end
sequence.