Tutorial: De-duplicate and clarify toml.dump()

The primary purpose of toml.dump() is to write to the file. The returned string is secondary.
Also toml is great but the tutorial doesn't need the same toml string quite so many times - so omit the print :)

Adding () helps the functions stand out in the text

README.rst

@@ -42,7 +42,7 @@ Or to install the latest development version, run:
 Quick Tutorial
 ==============
 
-*toml.loads* takes in a string containing standard TOML-formatted data and
+*toml.loads()* takes in a string containing standard TOML-formatted data and
 returns a dictionary containing the parsed data.
 
 .. code:: pycon
@@ -86,7 +86,7 @@ returns a dictionary containing the parsed data.
   >>> parsed_toml = toml.loads(toml_string)
 
 
-*toml.dumps* takes a dictionary and returns a string containing the
+*toml.dumps()* takes a dictionary and returns a string containing the
 corresponding TOML-formatted data.
 
 .. code:: pycon
@@ -112,32 +112,15 @@ corresponding TOML-formatted data.
   ip = "10.0.0.2"
   dc = "eqdc10"
 
-*toml.dump* takes a dictionary and a file descriptor and returns a string containing the
-corresponding TOML-formatted data.
+Similarly *toml.dump()* takes a dictionary and a file descriptor and writes a string containing the
+corresponding TOML-formatted data to the file. The string is also returned.
 
 .. code:: pycon
 
   >>> with open('new_toml_file.toml', 'w') as f:
-  ...     new_toml_string = toml.dump(parsed_toml, f)
-  >>> print(new_toml_string)
-  title = "TOML Example"
-  [owner]
-  name = "Tom Preston-Werner"
-  dob = 1979-05-27T07:32:00Z
-  [database]
-  server = "192.168.1.1"
-  ports = [ 8001, 8001, 8002,]
-  connection_max = 5000
-  enabled = true
-  [clients]
-  data = [ [ "gamma", "delta",], [ 1, 2,],]
-  hosts = [ "alpha", "omega",]
-  [servers.alpha]
-  ip = "10.0.0.1"
-  dc = "eqdc10"
-  [servers.beta]
-  ip = "10.0.0.2"
-  dc = "eqdc10"
+  ...     written_toml_string = toml.dump(parsed_toml, f)
+  >>> new_toml_string == written_toml_string
+  True
 
 For more functions, view the API Reference below.