manpage lint.

@@ -392,11 +392,11 @@
 .Xr standards 5 for more information about some of these.  Most interfaces
 should support at least UTF-8 in addition to ASCII.
 .It Em INTERFACE STABILITY
 Indicates the level of commitment to the interface. Interfaces can be described
 with in the following ways:
-.Bl -tag
+.Bl -tag -width Ds
 .It Nm Standard
 Indicates that the interface is defined by one or more standards bodies.
 Generally, changes to the interface will be carefully managed to conform
 to the relevant standards.  These interfaces are generally the most suitable
 for use in portable programs.

@@ -453,11 +453,11 @@
 This section describes considerations for the interface when used within
 programs that use multiple threads.  More discussion of these considerations
 is made in the MT-Level section of
 .Xr attributes 5 .
 The interface can be described in the following ways.
-.Bl -tag
+.Bl -tag -width Ds
 .It Nm Safe
 Indicates the interface is safe for use within multiple threads.  There
 may be additional caveats that apply, in which case those will be
 described.  Note that some interfaces have semantics which may affect
 other threads, but these should be an intrinsic part of the interface