Drop double newlines printed in some file iteration examples.

Patch by Steven Kryskalla.

Doc/tutorial/errors.rst

@@ -387,7 +387,7 @@ succeeded or failed. Look at the following example, which tries to open a file
 and print its contents to the screen. ::
 
    for line in open("myfile.txt"):
-       print(line)
+       print(line, end="")
 
 The problem with this code is that it leaves the file open for an indeterminate
 amount of time after this part of the code has finished executing.
@@ -397,7 +397,7 @@ used in a way that ensures they are always cleaned up promptly and correctly. ::
 
    with open("myfile.txt") as f:
        for line in f:
-           print(line)
+           print(line, end="")
 
 After the statement is executed, the file *f* is always closed, even if a
 problem was encountered while processing the lines. Objects which, like files,

Misc/ACKS

@@ -653,6 +653,7 @@ Pedro Kroger
 Hannu Krosing
 Andrej Krpic
 Ivan Krstić
+Steven Kryskalla
 Andrew Kuchling
 Dave Kuhlman
 Jon Kuhn