doc: Correct various Texinfo warnings about incorrect use of macros. * install.txi: Change @strong{Note:} to @strong{Note}: to move colon outside of macro. * edit.m: Change "WARNING!" to "Warning:" for consistency with other instances. * wilcoxon_test.m: Change "Warning:" to "Caution:" to more accurately reflect level of concern. * strmatch.m: Change @strong{Note:} to @strong{Caution:} to stop spurious cross-reference creation. * datenum.m: Change "Warning:" to "Caution:" to more accurately reflect level of concern. * oct-parse.yy: Change @xref to an @pxref to suppress warning about incorrect usage.

--- a/scripts/strings/strmatch.m
+++ b/scripts/strings/strmatch.m
@@ -43,7 +43,7 @@
 ## @end group
 ## @end example
 ##
-## @strong{Note:} @code{strmatch} is scheduled for deprecation.  Use
+## @strong{Caution:} @code{strmatch} is scheduled for deprecation.  Use
 ## @code{strcmpi} or @code{strncmpi} in all new code.
 ## @seealso{strfind, findstr, strcmp, strncmp, strcmpi, strncmpi, find}
 ## @end deftypefn