Replace the bogus "operator 0-" with the intended "operator[]"

ddv239 · web-flow · commit d99360dacdc7 · 2017-11-03T14:05:54.000-07:00
diff --git a/docs/standard-library/map-class.md b/docs/standard-library/map-class.md
@@ -1837,7 +1837,7 @@ int main( )
 ```  
 Type& operator[](const Key& key);
 
-Type& operator 0-(Key&& key);
+Type& operator[](Key&& key);
 ```  
   
 ### Parameters  
