Fix wfc string formatting

dev/src/builtins.cpp

@@ -1218,7 +1218,10 @@ nfr("wave_function_collapse", "tilemap,size", "S]I}:2", "S]I",
         iint cols = 0;
         for (ssize_t i = 0; i < rows; i++) {
             auto sv = tilemap.vval()->At(i).sval()->strv();
-            if (i) { if (ssize(sv) != cols) vm.BuiltinError("all columns must be equal length"); }
+            if (i) {
+                if (ssize(sv) != cols)
+                    vm.BuiltinError("all columns must be equal length");
+            }
             else cols = sv.size();
             inmap[i] = sv.data();
         }

samples/wave_function_collapse.lobster

@@ -1,20 +1,18 @@
 // Example of using Wave Function Collapse to generate gameworlds based on tiles.
 // Using ascii chars here for simplicity.
 
-// Using """ string literals so we don't have to escape \ :(
-
 let tilemap = [
-    """   /--\    """,
-    """   |  |    """,
-    """   |  |    """,
-    """/--J  L--\ """,
-    """|        | """,
-    """|        | """,
-    """L--\  /--J """,
-    """   |  |    """,
-    """   |  |    """,
-    """   L--J    """,
-    """           """,
+    "   /--\\    ",  // Not aligned because we escape \\
+    "   |  |    ",
+    "   |  |    ",
+    "/--J  L--\\ ",
+    "|        | ",
+    "|        | ",
+    "L--\\  /--J ",
+    "   |  |    ",
+    "   |  |    ",
+    "   L--J    ",
+    "           ",
 ]
 
 let benchmark = false