[v1.1] emacs: accept numeric parameter for ^Y

As of this commit, the ^Y (yank, a.k.a. paste) command accepts a
numeric parameter that will be taken as a repeat count. This can be
quite handy if you want to repeat text. Delete what you want to
repeat, then do ESC 10 ^Y to re-insert the deleted text 10 times.

src/cmd/ksh93/edit/emacs.c: ed_emacsread(): case cntl('Y'):
- Remove extra indentation due to unnecessary braces.
- Handle the numeric parameter 'count', already provided:
  - Multiply the length of the kill stack by count to check bounds
    and to shift the text under and to the right of the cursor.
  - Reinsert the contents of the kill stack count times.

ANNOUNCE

@@ -22,6 +22,9 @@ New command line editor features:
   saved before exiting the editor. This removes the need to empty the file
   and save just to cancel execution.
 
+- The emacs ^Y command now accepts a numeric parameter. For example,
+  ESC 10 ^Y will now "yank" (paste) the latest deleted text 10 times.
+
 New shell language features:
 
 - The appending redirection operator &>>FILE is now available. It is a

NEWS

@@ -2,6 +2,11 @@ This documents significant changes in the dev branch of ksh 93u+m.
 For full details, see the git log at: https://github.com/ksh93/ksh
 Uppercase BUG_* IDs are shell bug IDs as used by the Modernish shell library.
 
+2024-12-29:
+
+- [v1.1] The emacs ^Y command now accepts a numeric parameter. For example,
+  ESC 10 ^Y will now "yank" (paste) the latest deleted text 10 times.
+
 2024-12-25:
 
 - The dirname path-bound built-in now accepts multiple operands.

src/cmd/ksh93/edit/emacs.c

@@ -384,23 +384,24 @@ int ed_emacsread(void *context, int fd,char *buff,int scend, int reedit)
 			draw(ep,APPEND);
 			continue;
 		case cntl('Y') :
+			c = count * genlen(kstack);
+			if (c + eol > scend)
+			{
+				beep();
+				continue;
+			}
+			ep->mark = i;
+			for (i = eol; i >= cur; i--)
+				out[c + i] = out[i];
+			while (count--)
 			{
-				c = genlen(kstack);
-				if ((c + eol) > scend)
-				{
-					beep();
-					continue;
-				}
-				ep->mark = i;
-				for(i=eol;i>=cur;i--)
-					out[c+i] = out[i];
 				kptr=kstack;
 				while (i = *kptr++)
 					out[cur++] = i;
-				draw(ep,UPDATE);
-				eol = genlen(out);
-				continue;
 			}
+			draw(ep,UPDATE);
+			eol = genlen(out);
+			continue;
 		case '\n':
 		case '\r':
 			c = '\n';

src/cmd/ksh93/include/version.h

@@ -18,7 +18,7 @@
 #include <ast_release.h>
 #include "git.h"
 
-#define SH_RELEASE_DATE	"2024-12-25"	/* must be in this format for $((.sh.version)) */
+#define SH_RELEASE_DATE	"2024-12-29"	/* must be in this format for $((.sh.version)) */
 /*
  * This comment keeps SH_RELEASE_DATE a few lines away from SH_RELEASE_SVER to avoid
  * merge conflicts when cherry-picking dev branch commits onto a release branch.

src/cmd/ksh93/sh.1

@@ -5489,6 +5489,7 @@ The commands that accept a parameter are
 .BR ^R ,
 .BR ^P ,
 .BR ^N ,
+.BR ^Y ,
 .BR ^] ,
 .BR M-. ,
 .BR M-^] ,