Use one sentence per line in man page

This apparently lets troff do line wrapping better in some scenarios, and is
the best practice for text in revision control anyway.

doc/serdi.1

@@ -22,11 +22,9 @@ Chop \fIPREFIX\fR from matching blank node IDs.
 
 .TP
 .BR \-e
-Eat input one character at a time, rather than a page at a time which is the
-default.  This is useful when reading from a pipe since output will be
-generated immediately as input arrives, rather than waiting until an entire
-page of input has arrived.  With this option serdi uses one page less memory,
-but will likely be significantly slower.
+Eat input one character at a time, rather than a page at a time which is the default.
+This is useful when reading from a pipe since output will be generated immediately as input arrives, rather than waiting until an entire page of input has arrived.
+With this option serdi uses one page less memory, but will likely be significantly slower.
 
 .TP
 .BR \-f
@@ -48,7 +46,7 @@ Lax (non-strict) parsing.
 .TP
 .BR \-o " " \fISYNTAX\fR
 Write output as \fISYNTAX\fR.
-Valid values (case-insensitive): \*(lqturtle\*(rq, \*(lqntriples\*(rq, \*(lqtrig\*(rq, \*(lqnquads\*(rq
+Valid values (case-insensitive): \*(lqturtle\*(rq, \*(lqntriples\*(rq, \*(lqtrig\*(rq, \*(lqnquads\*(rq.
 
 .TP
 .BR \-p " " \fIPREFIX\fR
@@ -74,7 +72,7 @@ Display version information and exit.
 Serdi was written by David Robillard <d@drobilla.net>
 
 .SH COPYRIGHT
-Copyright \(co 2011-2017 David Robillard.
+Copyright \(co 2011-2020 David Robillard.
 .br
 License: <http://www.opensource.org/licenses/isc>
 .br