These hyphens don't need to be escaped.

Pointed out by:  pjd@

share/man/man9/g_bio.9

@@ -66,7 +66,7 @@ blocks before they will become reassigned and cryptographic devices may
 want to fill random bits into the range to reduce the amount of data
 available for attack.
 .It Dv BIO_GETATTR
-Inspect and manipulate out\-of\-band
+Inspect and manipulate out-of-band
 attributes on a particular provider or path.
 Attributes are named by ascii strings and are stored in the
 .Va bio_attribute

share/man/man9/g_geom.9

@@ -53,7 +53,7 @@ The
 .Fn g_new_geomf
 function creates a new geom, which will be an instance of the class
 .Fa mp .
-The geom's name is created in a printf\-like way from the rest of the arguments.
+The geom's name is created in a printf-like way from the rest of the arguments.
 .Pp
 The
 .Fn g_destroy_geom

share/man/man9/g_provider.9

@@ -52,7 +52,7 @@ The
 function creates a new provider on given geom
 .Fa gp .
 The name of the provider, which will appear as device in devfs, is created
-in a printf\-like way from the rest of
+in a printf-like way from the rest of
 the arguments.
 After creation, the caller has to set the provider's
 .Va mediasize