recoverdisk.1: Break lines at sentence stops

While here, remove whitespaces at end of lines.

Event:	EuroBSDcon 2025 Devsummit

sbin/recoverdisk/recoverdisk.1

@@ -71,9 +71,9 @@ is specified, the corresponding range is filled with '_UNREAD_'.
 .Pp
 The first pass attempts to read everything in "big-size" chunks,
 the second pass reads in "medium-size" chunks and third and subsequent
-passes read in "small-size" chunks.  This three stage process is
+passes read in "small-size" chunks.
-an attempt to optimize the case where only a few bad blocks exist
+This three stage process is an attempt to optimize the case where only
-on
+a few bad blocks exist on
 .Ar source .
 If too many read-errors are encountered,
 .Nm
@@ -103,7 +103,8 @@ every minute.
 .It Fl l Ar log-file
 Each successful read is logged with timestamp, offset and length.
 .It Fl t Ar totalsize
-How many bytes should be recovered.  The default is what
+How many bytes should be recovered.
+The default is what
 .Dv DIOCGMEDIASIZE
 reports for character and block devices or
 .Dv st_size
@@ -117,14 +118,16 @@ this long between reads.  This reduces the load on the
 device and the system in general.
 .It Fl p Ar pause
 .Xr sleep 3
-this long whenever a read fails.  This makes the
+this long whenever a read fails.
+This makes the
 .Ar source
 device look less sick to the operating system.
 .It Fl u Ar pattern
 By default blocks which cannot be read are filled with the pattern
 .Ql _UNREAD_
-in the output file.  This option can be used to specify a different
+in the output file.
-pattern.  If the pattern is the empty string, nothing is written.
+This option can be used to specify a different pattern.
+If the pattern is the empty string, nothing is written.
 .It Fl v
 Produce a detailed progress report with ANSI escapes and UTF-8.
 .El