write fewer spaces to C file

src/main.cc

@@ -43,19 +43,18 @@ bool preprocess(const char * input_fname)
 
 void write_node(FILE * file, Node * node)
 {
+    static bool write_space = false;
     switch (node->type)
     {
     case NODE_TYPE_LIST:
         {
-            bool space = false;
             for (auto subnode : *node->list)
             {
-                if (space)
+                if (write_space)
                 {
                     fprintf(file, " ");
                 }
                 write_node(file, subnode);
-                space = true;
             }
         }
         break;
@@ -64,6 +63,11 @@ void write_node(FILE * file, Node * node)
         if (*node->token.text == ";")
         {
             fprintf(file, "\n");
+            write_space = false;
+        }
+        else
+        {
+            write_space = true;
         }
         break;
     }