docs: minor formatting edits

ares_cancel.3

@@ -23,14 +23,15 @@ ares_cancel \- Cancel a resolve
 .B void ares_cancel(ares_channel \fIchannel\fP)
 .fi
 .SH DESCRIPTION
-The \fBares_cancel\fP function cancels all lookups/requests made on the the
+The \fBares_cancel(3)\fP function cancels all lookups/requests made on the the
-name service channel identified by \fIchannel\fP.  \fBares_cancel\fP invokes
+name service channel identified by \fIchannel\fP.  \fBares_cancel(3)\fP
-the callbacks for each pending query on the channel, passing a status of
+invokes the callbacks for each pending query on the channel, passing a status
+of
 .BR ARES_ECANCELLED .
-These calls give the callbacks a chance to clean up any state which
+These calls give the callbacks a chance to clean up any state which might have
-might have been stored in their arguments. If such a callback invocation adds
+been stored in their arguments. If such a callback invocation adds a new
-a new request to the channel, that request will \fInot\fP be cancelled by the
+request to the channel, that request will \fInot\fP be cancelled by the
-current invocation of \fBares_cancel\fP.
+current invocation of \fBares_cancel(3)\fP.
 .SH SEE ALSO
 .BR ares_init (3)
 .BR ares_destroy (3)

ares_destroy_options.3

@@ -23,12 +23,9 @@ ares_destroy_options \- Destroy options initialized with ares_save_options
 .B void ares_destroy_options(struct ares_options *\fIoptions\fP)
 .fi
 .SH DESCRIPTION
-The
+The \fBares_destroy_options(3)\fP function destroys the options struct
-.B ares_destroy_options
+identified by \Ioptions\fP, freeing all memory allocated by
-function destroys the options struct identified by
+\fBares_save_options(3)\fP.
-.IR options ,
-freeing all memory allocated by ares_save_options.
-
 .SH SEE ALSO
 .BR ares_save_options (3),
 .BR ares_init_options (3)

ares_dup.3

@@ -33,7 +33,7 @@ handle when the channel is no longer needed.
 .BR ares_init(3),
 .BR ares_library_init(3)
 .SH AVAILABILITY
-ares_dup(3) was added in c-ares 1.6.0
+\fIares_dup(3)\fP was added in c-ares 1.6.0
 .SH AUTHOR
 Daniel Stenberg
 

ares_free_string.3

@@ -23,9 +23,8 @@ ares_free_string \- Free strings allocated by ares functions
 .B void ares_free_string(void *\fIstr\fP)
 .fi
 .SH DESCRIPTION
-The
+The \fIares_free_string(3)\fP function frees a string allocated by an ares
-.I ares_free_string
+function.
-function frees a string allocated by an ares function.
 .SH SEE ALSO
 .BR ares_mkquery (3)
 .BR ares_expand_string (3)