Update BigDecimalParser.java

Author: pjfanning

src/main/java/com/fasterxml/jackson/core/io/BigDecimalParser.java

@@ -175,7 +175,7 @@ private static String _getValueDesc(final char[] array, final int offset, final
     }
 
     private static String _generateExceptionMessage(final String valueToReport, final String desc) {
-        return String.format("Value %s cannot be deserialized as `java.math.BigDecimal`, reason:  %s" ,
+        return String.format("Value %s can not be deserialized as `java.math.BigDecimal`, reason:  %s" ,
             valueToReport, desc);
     }