Fix symbol printing in schemas

src/preserves/private/preserves_schema_nim.nim

@@ -461,7 +461,7 @@ proc generateNimFile*(scm: Schema; path: string) =
               nn(nkPragma,
                 nn(nkExprColonExpr,
                   ident"record",
-                  PNode(kind: nkStrLit, strVal: $def.nodes[0])))),
+                  PNode(kind: nkStrLit, strVal: $def.nodes[0].value.symbol)))),
               newEmpty(),
               t)
         else:

src/preserves/schemas.nim

@@ -137,7 +137,13 @@ proc `$`*(n: SchemaNode): string =
     result.add " ...:...}"
   of snkRecord:
     result.add '<'
-    result.add join(n.nodes, " ")
+    if n.nodes[0].kind == snkLiteral and n.nodes[0].value.kind == pkSymbol:
+      result.add n.nodes[0].value.symbol
+      for i in 1..n.nodes.high:
+        result.add ' '
+        result.add $n.nodes[i]
+    else:
+      result.add join(n.nodes, " ")
     result.add '>'
   of snkTuple:
     result.add '['