Fix intro example

Author: sophiajt

snippets/introduction/help_example.sh

@@ -1,16 +1,31 @@
-> help config
-Configuration management.
+> help path
+Explore and manipulate paths.
+
+There are three ways to represent a path:
+
+* As a path literal, e.g., '/home/viking/spam.txt'
+* As a structured path: a table with 'parent', 'stem', and 'extension' (and
+* 'prefix' on Windows) columns. This format is produced by the 'path parse'
+  subcommand.
+* As an inner list of path parts, e.g., '[[ / home viking spam.txt ]]'.
+  Splitting into parts is done by the `path split` command.
+
+join' subcommand can be used to join the structured path or path parts back into
+the path literal.
 
 Usage:
-  > config <subcommand> {flags}
+  > path 
 
 Subcommands:
-  config get - Gets a value from the config
-  config set - Sets a value in the config
-  config set_into - Sets a value in the config
-  config clear - clear the config
-  config remove - Removes a value from the config
-  config path - return the path to the config file
+  path basename - Get the final component of a path
+  path dirname - Get the parent directory of a path
+  path exists - Check whether a path exists
+  path expand - Try to expand a path to its absolute form
+  path join - Join a structured path or a list of path parts.
+  path parse - Convert a path into structured data.
+  path relative-to - Get a path as relative to another path.
+  path split - Split a path into parts by a separator.
+  path type - Get the type of the object a path refers to (e.g., file, dir, symlink)
 
 Flags:
-  -h, --help: Display this help message
+  -h, --help