Recognize ' ', '}', ')' as terminators of overbar in conversion

Fixes bug 3 in https://gitlab.com/kicad/code/kicad/-/issues/8591.

common/string.cpp

@@ -34,7 +34,7 @@
 
 
 /**
- * Illegal file name characters used to insure file names will be valid on all supported
+ * Illegal file name characters used to ensure file names will be valid on all supported
  * platforms.  This is the list of illegal file name characters for Windows which includes
  * the illegal file name characters for Linux and OSX.
  */
@@ -86,6 +86,12 @@ wxString ConvertToNewOverbarNotation( const wxString& aOldStr )
                 continue;
             }
         }
+        else if( ( *chIt == ' ' || *chIt == '}' || *chIt == ')' ) && inOverbar )
+        {
+            // Spaces were used to terminate overbar as well
+            newStr << "}";
+            inOverbar = false;
+        }
 
         newStr << *chIt;
     }