[PATCH v3 3/4] gdb/python doc: Fix confusion between gdb.unwinders and gdb.unwinder

[Paulo Neves <ptsneves@gmail.com>]

Replace gdb.unwinders with gdb.unwinder. The gdb.unwinders module does
not and trying to import it leads to errors. Other instances of the
manual correctly refer to gdb.unwinder.
---
 gdb/doc/python.texi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gdb/doc/python.texi b/gdb/doc/python.texi
index 3e4833a4a41..e2821755851 100644
--- a/gdb/doc/python.texi
+++ b/gdb/doc/python.texi
@@ -2794,7 +2794,7 @@ class.  Derive your unwinder class from it and structure the code as
 follows:
 
 @smallexample
-from gdb.unwinders import Unwinder
+from gdb.unwinder import Unwinder
 
 class FrameId(object):
     def __init__(self, sp, pc):
@@ -2835,7 +2835,7 @@ gdb.unwinder.register_unwinder (<locus>, MyUnwinder, replace=<True|False>)
 An object file, a program space, and the @value{GDBN} proper can have
 unwinders registered with it.
 
-The @code{gdb.unwinders} module provides the function to register a
+The @code{gdb.unwinder} module provides the function to register a
 unwinder:
 
 @defun gdb.unwinder.register_unwinder (locus, unwinder, replace=False)
-- 
2.25.1