Small doc markup fixes

* doc/lispref/control.texi (Pattern matching case statement):
* doc/lispref/os.texi (Desktop Notifications): Markup fixes.

doc/lispref/ChangeLog

 2014-12-24  Glenn Morris  <rgm@gnu.org>
 
+	* control.texi (Pattern matching case statement):
+	* os.texi (Desktop Notifications):
 	* modes.texi (Defining Minor Modes, SMIE Lexer): Markup fixes.
 
 2014-12-23  Eli Zaretskii  <eliz@gnu.org>

doc/lispref/control.texi

@@ -370,8 +370,8 @@ that location.
 More specifically, a Q-pattern can take the following forms:
 @table @code
 @item (@var{qpattern1} . @var{qpattern2})
-This pattern matches any cons cell whose @code{car} matches @var{QPATTERN1} and
-whose @code{cdr} matches @var{PATTERN2}.
+This pattern matches any cons cell whose @code{car} matches @var{qpattern1} and
+whose @code{cdr} matches @var{pattern2}.
 @item @var{atom}
 This pattern matches any atom @code{equal} to @var{atom}.
 @item ,@var{upattern}

doc/lispref/os.texi

@@ -2527,7 +2527,7 @@ The server's version number.
 The specification version the server is compliant with.
 @end table
 
-If @var{SPEC_VERSION} is @code{nil}, the server supports a
+If @var{spec_version} is @code{nil}, the server supports a
 specification prior to @samp{"1.0"}.
 @end defun