trunk/ctags.1: fix two small grammatical errors in the man page.

ctags.1

@@ -466,7 +466,7 @@ default set, or '\-' to exclude it. In the absence of any preceding '+' or '\-'
 sign, only those kinds explicitly listed in \fIflags\fP will be included in
 the output (i.e. overriding the default set). This option is ignored if the
 option \fB\-\-format\fP=\fI1\fP has been specified. The default value 
-of this options is \fIfks\fP.
+of this option is \fIfks\fP.
 .RE
 
 .TP 5
@@ -518,7 +518,7 @@ Prints to standard output a detailed usage description, and then exits.
 Indicates a preference as to whether code within an "#if 0" branch of a
 preprocessor conditional should be examined for non-macro tags (macro tags are
 always included). Because the intent of this construct is to disable code, the
-default value of this options is \fIno\fP. Note that this indicates a
+default value of this option is \fIno\fP. Note that this indicates a
 preference only and does not guarantee skipping code within an "#if 0" branch,
 since the fall-back algorithm used to generate tags when preprocessor
 conditionals are too complex follows all branches of a conditional. This