Fix typos and wording in the Emacs manual

* doc/emacs/dired.texi (Marks vs Flags, Hiding Subdirectories):
* doc/emacs/maintaining.texi (Tag Syntax):
* doc/emacs/building.texi (Commands of GUD, Threads Buffer)
(Lisp Libraries):
* doc/emacs/windows.texi (Temporary Displays): Fix typos.
* doc/emacs/files.texi (Backup Copying): Fix wording.  Reported by
Stefan Kamphausen <stefan.kamphausen@acrolinx.com> in
emacs-manual-bugs@gnu.org.

doc/emacs/building.texi

@@ -649,7 +649,7 @@ Set a breakpoint on the source line that point is on.
 buffer, sets a debugger breakpoint on the current source line.  This
 command is available only after starting GUD@.  If you call it in a
 buffer that is not associated with any debugger subprocess, it signals
-a error.
+an error.
 
 @kindex C-x C-a @r{(GUD)}
   The following commands are available both in the GUD interaction
@@ -1096,9 +1096,9 @@ display the corresponding buffer in a new frame.
   When you create a buffer showing information about some specific
 thread, it becomes bound to that thread and keeps showing actual
 information while you debug your program.  The mode indicator for each
-GDB buffer shows the number of thread it is showing information about.
-The thread number is also included in the buffer name of bound
-buffers.
+GDB buffer shows the number of the thread whose information that
+buffer displays.  The thread number is also included in the name of
+each bound buffer.
 
   Further commands are available in the GDB Threads buffer which
 depend on the mode of GDB that is used for controlling execution of
@@ -1449,7 +1449,7 @@ buffer).  To disable this feature, change the variable
 @vindex load-dangerous-libraries
 @cindex Lisp files byte-compiled by XEmacs
   By default, Emacs refuses to load compiled Lisp files which were
-compiled with XEmacs, a modified versions of Emacs---they can cause
+compiled with XEmacs, a modified version of Emacs---they can cause
 Emacs to crash.  Set the variable @code{load-dangerous-libraries} to
 @code{t} if you want to try loading them.
 

doc/emacs/dired.texi

@@ -579,9 +579,10 @@ might be inconsistent with the file on disk if its contents have changed
 since it was last visited.  If you don't want this, you may wish to
 revert the files you have visited in your buffers, or to turn on
 the @code{auto-revert} mode in those buffers, before invoking this
-command.  @xref{Reverting}.  If you prefer that this command always revisit
-the file, without having to revert the file or enable @code{auto-revert}
-mode, you might want to set @code{dired-always-read-filesystem} to non-@code{nil}.
+command.  @xref{Reverting}.  If you prefer that this command always
+revisits the file, without having to revert the file or enable
+@code{auto-revert} mode, you might want to set
+@code{dired-always-read-filesystem} to non-@code{nil}.
 
 @item C-/
 @itemx C-x u
@@ -1173,7 +1174,7 @@ without having to remove the Dired marks on files in those
 subdirectories.
 
 @xref{Subdirectories in Dired}, for how to insert a subdirectory
-listing, and @pxref{Dired Updating} for how delete it.
+listing, and see @ref{Dired Updating}, for how to delete it.
 
 @node Dired Updating
 @section Updating the Dired Buffer

doc/emacs/files.texi

@@ -694,11 +694,12 @@ Otherwise, renaming is the default choice.
 
   When a file is managed with a version control system (@pxref{Version
 Control}), Emacs does not normally make backups in the usual way for
-that file.  But check-in and check-out are similar in some ways to
-making backups.  One unfortunate similarity is that these operations
-typically break hard links, disconnecting the file name you visited from
-any alternate names for the same file.  This has nothing to do with
-Emacs---the version control system does it.
+that file.  But @dfn{committing} (a.k.a.@: @dfn{checking in},
+@pxref{VCS Concepts}) new versions of files is similar in some ways
+to making backups.  One unfortunate similarity is that these
+operations typically break hard links, disconnecting the file name you
+visited from any alternate names for the same file.  This has nothing
+to do with Emacs---the version control system does it.
 
 @node Customize Save
 @subsection Customizing Saving of Files

doc/emacs/maintaining.texi

@@ -2203,7 +2203,7 @@ In Ada, the same name can be used for different kinds of entity
 (e.g., for a procedure and for a function).  Also, for things like
 packages, procedures and functions, there is the spec (i.e., the
 interface) and the body (i.e., the implementation).  To make it
-easier to pick the definition you want, Ada tag name have suffixes
+easier to pick the definition you want, Ada tag names have suffixes
 indicating the type of entity:
 
 @table @samp

doc/emacs/windows.texi

@@ -465,7 +465,7 @@ bottom of the selected frame, regardless of the number of windows
 already shown on that frame.
 
   If you prefer Emacs to display a temporary buffer in a different
-fashion, we recommend to customize the variable
+fashion, we recommend customizing the variable
 @code{display-buffer-alist} (@pxref{Choosing Window,,Choosing a Window
 for Display, elisp, The Emacs Lisp Reference Manual}).  For example,
 to display @file{*Completions*} by splitting a window as described in