shithub: kwa

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format: fix %c for empty strings and numerics

--- a/run.c

+++ b/run.c

@@ -933,11 +933,16 @@

 			sprint(p, fmt, t);

 			break;

 		case 5:

-			if (isnum(x))

-				r = (Rune) getfval(x);

-			else

-				chartorune(&r, getsval(x));

-			p += runetochar(p, &r);

+			if (isnum(x)) {

+				r = getfval(x);

+				p += runetochar(p, &r);

+			} else {

+				t = getsval(x);

+				if(*t != '\0'){

+					chartorune(&r, t);

+					p += runetochar(p, &r);

+				}

+			}

 			*p = '\0';

 			break;

 		}

-- 

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