Fix expression function examples

Author: nyalldawson

resources/function_help/json/file_name

@@ -3,6 +3,6 @@
   "type": "function",
   "description": "Returns the name of a file (including the file extension), excluding the directory.",
   "arguments": [ {"arg":"path","description":"a file path"}],
-  "examples": [ { "expression":"base_file_name('/home/qgis/data/country_boundaries.shp')", "returns":"'country_boundaries.shp'"}]
+  "examples": [ { "expression":"file_name('/home/qgis/data/country_boundaries.shp')", "returns":"'country_boundaries.shp'"}]
 }
 

resources/function_help/json/file_path

@@ -3,6 +3,6 @@
   "type": "function",
   "description": "Returns the directory component of a file path. This does not include the file name.",
   "arguments": [ {"arg":"path","description":"a file path"}],
-  "examples": [ { "expression":"base_file_name('/home/qgis/data/country_boundaries.shp')", "returns":"'/home/qgis/data'"}]
+  "examples": [ { "expression":"file_path('/home/qgis/data/country_boundaries.shp')", "returns":"'/home/qgis/data'"}]
 }
 

resources/function_help/json/file_suffix

@@ -3,6 +3,6 @@
   "type": "function",
   "description": "Returns the file suffix (extension) from a file path.",
   "arguments": [ {"arg":"path","description":"a file path"}],
-  "examples": [ { "expression":"base_file_name('/home/qgis/data/country_boundaries.shp')", "returns":"'shp'"}]
+  "examples": [ { "expression":"file_suffix('/home/qgis/data/country_boundaries.shp')", "returns":"'shp'"}]
 }