Added linebreak escape character

examples/hello.modal

@@ -1,5 +1,4 @@
-<> (greeting) (Melcome to)
-<> (name) (Modal --)
-<> (?: ?: -- print) ()
+<> (lang_name) (Modal)
+<> (?: print) ()
 
-greeting name print
+(Welcome to lang_name \nHave fun! \n) print

src/modal.c

@@ -65,7 +65,11 @@ set_reg(int r, char *b)
 	} else if(r == ':') {
 		char *bb = walk(b);
 		if(*b == '(') b++, --bb;
-		while(b < bb) putc(*(b++), stdout);
+		while(b < bb) {
+			char c = *(b++);
+			if(c == '\\' && *(b++) == 'n') c = 0xa;
+			putc(c, stdout);
+		}
 	} else
 		regs[r] = b;
 	return 1;