Refactor tags_check_symbol function for clarity

Author: fengzeroz

plugins/restful/adapter_handle.c

@@ -64,10 +64,10 @@ static bool tags_check_symbol(const char *tags)
 {
     for (size_t i = 0; i < strlen(tags); i++) {
         char c = tags[i];
-        if (c == '^' || c == '=' || c == '[' || c == ']' || c == '{' ||
-            c == '}' || c == ';' || c == ':' || c == '\'' || c == '"' ||
-            c == '<' || c == '>' || c == '?' || c == '\\' || c == '|' ||
-            c == '~' || c == '`' || c == '\t' || c == '\n') {
+        if (c == '[' || c == ']' || c == '{' || c == '}' || c == ';' || 
+            c == ':' || c == '\'' || c == '"' || c == '<' || c == '>' || 
+            c == '?' || c == '\\' || c == '|' || c == '`' || c == '\t' || 
+            c == '\n') {
             return false;
         }
     }
@@ -746,4 +746,4 @@ void handle_put_node_tag(nng_aio *aio)
                 }
             }
         })
-}
+}