Update README.md

README.md

@@ -104,7 +104,7 @@ Result:
 
 - `typeOf`: returns type representation of the data (e.g. `str`, `int`, `float`, etc.)
 - `strToLocation`: given a string with a comma separated list of decimal numbers, returns an array of such numbers. Example: `"value1, value2"|strToLocation`. Example: `"value1, value2"|strToLocation` returns `[value1, value2]`. It's name (maybe not very good :) is due to it can be useful to generate a [GeoJSON](https://geojson.org/) representing a point which coordinates are provided in a string, eg: `{coordinates:(point|strToLocation),type: "Point"}`
-- `nullSafe`: return the input value, if not `None`, or a failsafe value. Example: `a|safeNull(23)` return the value of `a` if `a` is not None or `23` if `a` is None. 
+- `nullSafe`: return the input value, if not `None`, or a failsafe value. Example: `a|nullSafe(23)` return the value of `a` if `a` is not `None` or `23` if `a` is `None`. 
 
 ## Packaging