Merge lines.love

Dependencies

• [2] LXW73CJ3 Merge lines.love
• [3] OB5XOXVC deemphasize the source editor
• [4] UEE5W7WJ document one more shortcut
• [5] 27DROQW2 Merge upstream into main
• [6] 5HU63MB2 Merge lines.love
• [7] KKMFQDR4 editing source code from within the app
• [8] D4FEFHQC flesh out Readme
• [9] BH7BT36L ctrl+a: select entire buffer
• [10] BPL2TDWH document one more shortcut
• [*] FS2ITYYH record a known issue

Change contents

• edit in README.md at line 58
  [2.83]→[4.210405:210438](∅→∅),[4.91]→[4.210405:210438](∅→∅),[4.739]→[4.210405:210438](∅→∅),[4.91]→[4.210405:210438](∅→∅)
  − * `ctrl+e` to modify the sources