Merge pull request 'Pass '\\' (a character) to putchar, not "\\" (a pointer)' (#3) from noisytoot/coreutils:echo-putchar-patch into main

Reviewed-on: https://codeberg.org/GRU/coreutils/pulls/3

src/echo.c

@@ -42,7 +42,7 @@ int main(int argc, char *argv[]) {
 	      				putchar('\v');
 	      				break;
 	    			case '\\':
-	      				putchar("\\");
+	      				putchar('\\');
 	      				break;
 	    			default:
 	      				printf("\\%c", argv[i][j]);