linenoise: multi-line behavior for del to bol/eol.

* linenoise/linenoise.c (edit_delete_prev_all):
In multi-line mode, delete only to beginning of physical
line, not the entire logical line.
Also, detect noop cases and don't do record undo
or produce any effect.
(edit_delete_to_eol): New function.
(edit): Use edit_delete_to_eol function for Ctrl-K instead of
inline code.

* txr.1: Documented.

1 files changed, 6 insertions, 3 deletions

diff --git a/txr.1 b/txr.1
index 70a48a4b..673c1d5e 100644
--- a/txr.1
+++ b/txr.1
@@ -33624,11 +33624,17 @@ The Ctrl-U ("undo typing") command is a "super backspace" operation: it deletes
 all characters to the left of the cursor position. The cursor is moved to
 the leftmost position.
 
+In multi-line mode, Ctrl-U deletes only to the beginning of the current
+physical line, not all the way to the first position of the buffer.
+
 .NP* Delete to End of Line
 
 The Ctrl-K ("kill") command deletes the character under the cursor position
 and all subsequent characters. The cursor position doesn't change.
 
+In multi-line mode, Ctrl-K deletes only until the end of the current
+physical line, not the entire buffer.
+
 .NP* Verbatim Character Insert
 
 The Ctrl-V ("verbatim") command places the listener's input editor into
@@ -33984,9 +33990,6 @@ breaks rather than being rendered as
 To insert a line break character, use the sequence: Ctrl-V, Ctrl-M.
 Or, equivalently: Ctrl-V, Enter.
 
-Note that the Ctrl-K and Ctrl-U commands regard the entire input to be one
-logical line, ignoring the line breaks.
-
 Because carriage returns are not line terminators in text files,
 lines which contain embedded carriage returns are correctly saved
 into and retrieved from the persistent history file.