Spaces at the beginning of lines are stuffed when using heredoc

[sanfrecce-osaka]

Description

Expected

Spaces at the beginning of line are not stuffed when using heredoc

irb(main):001:0" foo = <<FOO
irb(main):002:0"   abcdefg
irb(main):003:0> FOO
=> "  abcdefg\n"

Actual

Case1

Spaces at the beginning of lines are packed after finalization

Case2

The following will cause the spaces at the beginning of the line to be stuffed

1. Input spaces at the beginning of line and start a new line
2. Enter the delete key

Result of irb_info

irb(main):001:0> irb_info
=>
Ruby version: 3.0.1
IRB version: irb 1.3.6 (2021-06-19)
InputMethod: ReidlineInputMethod with Reline 0.2.5
.irbrc path: /Users/moritsukamasatoshi/.irbrc
RUBY_PLATFORM: x86_64-darwin20

Terminal Emulator

iTerm2 3.4.6

Setting Files

Not used

[aycabta]

Thank you for your reporting, this is fixed by #291.