* tm.texi: Fix markup.

From-SVN: r43907

gcc/doc/tm.texi

@@ -5982,8 +5982,7 @@ the character @samp{;} is treated as a logical line separator.
 @end table
 
 @deftypevr {Target Hook} {const char *} TARGET_ASM_OPEN_PAREN
-@end deftypevr
-@deftypevr {Target Hook} {const char *} TARGET_ASM_CLOSE_PAREN
+@deftypevrx {Target Hook} {const char *} TARGET_ASM_CLOSE_PAREN
 These target hooks are C string constants, describing the syntax in the
 assembler for grouping arithmetic expressions.  If not overridden, they
 default to normal parentheses, which is correct for most assemblers.