replace '<string>' source name with '[string]'

src/logic/CommandsInterpreter.cpp

@@ -418,7 +418,7 @@ Command Command::create(
     std::string_view description,
     executor_func executor
 ) {
-    return CommandParser("<string>", scheme)
+    return CommandParser("[string]", scheme)
         .parseScheme(std::move(executor), description);
 }
 
@@ -440,5 +440,5 @@ Command* CommandsRepository::get(const std::string& name) {
 }
 
 Prompt CommandsInterpreter::parse(std::string_view text) {
-    return CommandParser("<string>", text).parsePrompt(this);
+    return CommandParser("[string]", text).parsePrompt(this);
 }