diff --git a/Doc/howto/curses.rst b/Doc/howto/curses.rst
index 2d964c3..71e640c 100644
--- a/Doc/howto/curses.rst
+++ b/Doc/howto/curses.rst
@@ -426,7 +426,7 @@
 Because the curses API is so large, some functions aren't supported in the
 Python interface, not because they're difficult to implement, but because no one
 has needed them yet.  Feel free to add them and then submit a patch.  Also, we
-don't yet have support for the menus or panels libraries associated with
+don't yet have support for the menu library associated with
 ncurses; feel free to add that.
 
 If you write an interesting little program, feel free to contribute it as
diff --git a/Doc/library/mmap.rst b/Doc/library/mmap.rst
index 09ec73b..a6e9bdc 100644
--- a/Doc/library/mmap.rst
+++ b/Doc/library/mmap.rst
@@ -99,10 +99,10 @@
       import mmap
 
       # write a simple example file
-      with open("hello.txt", "w") as f:
+      with open("hello.txt", "wb") as f:
           f.write("Hello Python!\n")
 
-      with open("hello.txt", "r+") as f:
+      with open("hello.txt", "r+b") as f:
           # memory-map the file, size 0 means whole file
           map = mmap.mmap(f.fileno(), 0)
           # read content via standard file methods
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 3417970..deebda7 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -861,7 +861,7 @@
    found.
 
 
-.. method:: str.format(format_string, *args, **kwargs)
+.. method:: str.format(*args, **kwargs)
 
    Perform a string formatting operation.  The *format_string* argument can
    contain literal text or replacement fields delimited by braces ``{}``.  Each