4 files changed, 19 insertions, 17 deletions

diff --git a/doc/lispref/files.texi b/doc/lispref/files.texi
index 021a62a56ab..6a0312bd2f3 100644
--- a/doc/lispref/files.texi
+++ b/doc/lispref/files.texi
@@ -1170,14 +1170,14 @@ Sometimes file names or their parts need to be compared as strings, in
 which case it's important to know whether the underlying filesystem is
 case-insensitive.  This function returns @code{t} if file
 @var{filename} is on a case-insensitive filesystem.  It always returns
-@code{t} on MS-DOS and MS-Windows.  On Cygwin and Mac OS X,
+@code{t} on MS-DOS and MS-Windows.  On Cygwin and macOS,
 filesystems may or may not be case-insensitive, and the function tries
 to determine case-sensitivity by a runtime test.  If the test is
 inconclusive, the function returns @code{t} on Cygwin and @code{nil}
-on Mac OS X.
+on macOS.
 
 Currently this function always returns @code{nil} on platforms other
-than MS-DOS, MS-Windows, Cygwin, and Mac OS X.  It does not detect
+than MS-DOS, MS-Windows, Cygwin, and macOS.  It does not detect
 case-insensitivity of mounted filesystems, such as Samba shares or
 NFS-mounted Windows volumes.  On remote hosts, it assumes @code{t} for
 the @samp{smb} method.  For all other connection methods, runtime
@@ -1297,9 +1297,10 @@ The file's @acronym{GID}, likewise (@code{file-attribute-group-id}).
 The time of last access, as a list of four integers
 @code{(@var{sec-high} @var{sec-low} @var{microsec} @var{picosec})}
 (@code{file-attribute-access-time}).  (This is similar to the value of
-@code{current-time}; see @ref{Time of Day}.)  Note that on some
+@code{current-time}; see @ref{Time of Day}.)  The value is truncated
+to that of the filesystem's timestamp resolution; for example, on some
 FAT-based filesystems, only the date of last access is recorded, so
-this time will always hold the midnight of the day of last access.
+this time will always hold the midnight of the day of the last access.
 
 @cindex modification time of file
 @item
diff --git a/doc/lispref/loading.texi b/doc/lispref/loading.texi
index 0165d114a75..82c133de753 100644
--- a/doc/lispref/loading.texi
+++ b/doc/lispref/loading.texi
@@ -1151,7 +1151,7 @@ extension, a.k.a.@: ``suffix''.  This suffix is platform-dependent.
 
 @defvar module-file-suffix
 This variable holds the system-dependent value of the file-name
-extension of the module files.  Its value is @file{.so} on Posix hosts
+extension of the module files.  Its value is @file{.so} on POSIX hosts
 and @file{.dll} on MS-Windows.
 @end defvar
 
diff --git a/doc/lispref/os.texi b/doc/lispref/os.texi
index 1a4e2db44a6..9352a929a7a 100644
--- a/doc/lispref/os.texi
+++ b/doc/lispref/os.texi
@@ -257,7 +257,7 @@ options were specified.
 
 @item
 If a daemon was requested, it calls @code{server-start}.
-(On Posix systems, if a background daemon was requested, it then
+(On POSIX systems, if a background daemon was requested, it then
 detaches from the controlling terminal.)  @xref{Emacs
 Server,,, emacs, The GNU Emacs Manual}.
 
@@ -888,7 +888,7 @@ IBM's AIX.
 Berkeley BSD and its variants.
 
 @item cygwin
-Cygwin, a Posix layer on top of MS-Windows.
+Cygwin, a POSIX layer on top of MS-Windows.
 
 @item darwin
 Darwin (macOS).
@@ -1325,13 +1325,13 @@ omitted or @code{nil}, the conversion uses Emacs's default time zone.
 If it is @code{t}, the conversion uses Universal Time.  If it is
 @code{wall}, the conversion uses the system wall clock time.  If it is
 a string, the conversion uses the time zone rule equivalent to setting
-@env{TZ} to that string.  If it is an integer @var{offset}, the
-conversion uses a fixed time zone with the given offset and a numeric
-abbreviation on POSIX-compatible platforms and an unspecified abbreviation
-on MS-Windows.  If it is a list (@var{offset} @var{abbr}), where
+@env{TZ} to that string.  If it is a list (@var{offset} @var{abbr}), where
 @var{offset} is an integer number of seconds east of Universal Time
 and @var{abbr} is a string, the conversion uses a fixed time zone with
-the given offset and abbreviation.
+the given offset and abbreviation.  An integer @var{offset} is treated
+as if it were (@var{offset} @var{abbr}), where @var{abbr} is a numeric
+abbreviation on POSIX-compatible platforms and is unspecified on
+MS-Windows.
 
 @defun current-time-zone &optional time zone
 @cindex time zone, current
@@ -1488,6 +1488,7 @@ This is a synonym for @samp{%x %X}.
 @item %C
 This stands for the century, that is, the year divided by 100,
 truncated toward zero.
+The default field width is 2.
 @item %d
 This stands for the day of month, zero-padded.
 @item %D
@@ -2398,7 +2399,7 @@ Emacs is restarted by the session manager.
 
 Emacs is able to send @dfn{notifications} on systems that support the
 freedesktop.org Desktop Notifications Specification and on MS-Windows.
-In order to use this functionality on Posix hosts, Emacs must have
+In order to use this functionality on POSIX hosts, Emacs must have
 been compiled with D-Bus support, and the @code{notifications} library
 must be loaded.  @xref{Top, , D-Bus,dbus,D-Bus integration in Emacs}.
 The following function is supported when D-Bus support is available:
diff --git a/doc/lispref/streams.texi b/doc/lispref/streams.texi
index a25a5bfe84a..bd7dc2d9af3 100644
--- a/doc/lispref/streams.texi
+++ b/doc/lispref/streams.texi
@@ -344,7 +344,7 @@ When reading or writing from the standard input/output streams of the
 Emacs process in batch mode, it is sometimes required to make sure any
 arbitrary binary data will be read/written verbatim, and/or that no
 translation of newlines to or from CR-LF pairs is performed.  This
-issue does not exist on Posix hosts, only on MS-Windows and MS-DOS@.
+issue does not exist on POSIX hosts, only on MS-Windows and MS-DOS@.
 The following function allows you to control the I/O mode of any
 standard stream of the Emacs process.
 
@@ -354,7 +354,7 @@ non-@code{nil}, switch to binary mode, otherwise switch to text mode.
 The value of @var{stream} can be one of @code{stdin}, @code{stdout},
 or @code{stderr}.  This function flushes any pending output data of
 @var{stream} as a side effect, and returns the previous value of I/O
-mode for @var{stream}.  On Posix hosts, it always returns a
+mode for @var{stream}.  On POSIX hosts, it always returns a
 non-@code{nil} value and does nothing except flushing pending output.
 @end defun
 
@@ -707,7 +707,7 @@ indent and fill the object to make it more readable for humans.
 
 If you need to use binary I/O in batch mode, e.g., use the functions
 described in this section to write out arbitrary binary data or avoid
-conversion of newlines on non-Posix hosts, see @ref{Input Functions,
+conversion of newlines on non-POSIX hosts, see @ref{Input Functions,
 set-binary-mode}.
 
 @node Output Variables