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awk: support %q in s*printf()

--- a/sys/src/cmd/awk/main.c

+++ b/sys/src/cmd/awk/main.c

@@ -157,6 +157,7 @@

 	argv[0] = cmdname;	/* put prog name at front of arglist */

 	   dprint( ("argc=%d, argv[0]=%s\n", argc, argv[0]) );

 	arginit(argc, argv);

+	quotefmtinstall();

 	yyparse();

 	if (fs)

 		*FS = qstring(fs, '\0');

--- a/sys/src/cmd/awk/run.c

+++ b/sys/src/cmd/awk/run.c

@@ -911,7 +911,7 @@

 			*t++ = *s;

 			*t = '\0';

 			break;

-		case 's':

+		case 's': case 'q':

 			flag = 4;

 			break;

 		case 'c':

-- 

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