mdoc: make sure to pass at least one argument to quotation macros

lib/libc/locale/isgraph.3

@@ -48,7 +48,7 @@
 The
 .Fn isgraph
 function tests for any printing character except space
-.Pq Ql "\ "
+.Pq Ql "\~"
 and other
 locale-specific space-like characters.
 The value of the argument must be representable as an

lib/libc/locale/mbrtowc.3

@@ -69,7 +69,7 @@ was
 .Dv NULL ,
 .Fa s
 was an empty string
-.Pq Qq
+.Pq Qq \&
 and
 .Fa n
 was 1.

lib/libc/rpc/publickey.3

@@ -44,7 +44,7 @@ fails to decrypt the secret key, the routine will return 1 but the
 argument will be a
 .Dv NULL
 string
-.Pq Dq .
+.Pq Dq \& .
 .Sh SEE ALSO
 .Xr publickey 5
 .Pp

lib/libkvm/kvm_getloadavg.3

@@ -50,7 +50,7 @@ averaged over various periods of time.
 Up to
 .Fa nelem
 samples are retrieved and assigned to successive elements of
-.Fa loadavg Ns Bq .
+.Fa loadavg Ns Bq \& .
 The system imposes a maximum of 3 samples, representing averages
 over the last 1, 5, and 15 minutes, respectively.
 .Sh DIAGNOSTICS

sys/boot/common/loader.8

@@ -806,7 +806,7 @@ Evaluates the remainder of the input buffer under a
 exception guard.
 .It Ic .#
 Works like
-.Ic .
+.Ic "."
 but without outputting a trailing space.
 .It Ic fclose Pq Ar fd --
 Closes a file.

usr.bin/c89/c89.1

@@ -94,7 +94,7 @@ absolute pathnames to look in the directory named by the
 pathname before looking in the usual places.
 Thus, headers whose
 names are enclosed in double-quotes
-.Pq Qq
+.Pq Qq \&
 will be searched for first
 in the directory of the file with the
 .Ic #include
@@ -103,7 +103,7 @@ directories named in
 .Fl I
 options, and last in the usual places.
 For headers whose names are enclosed in angle brackets
-.Pq Aq ,
+.Pq Aq \& ,
 the header
 will be searched for only in directories named in
 .Fl I

usr.bin/c99/c99.1

@@ -96,7 +96,7 @@ absolute pathnames to look in the directory named by the
 pathname before looking in the usual places.
 Thus, headers whose
 names are enclosed in double-quotes
-.Pq Qq
+.Pq Qq \&
 will be searched for first
 in the directory of the file with the
 .Ic #include
@@ -105,7 +105,7 @@ directories named in
 .Fl I
 options, and last in the usual places.
 For headers whose names are enclosed in angle brackets
-.Pq Aq ,
+.Pq Aq \& ,
 the header
 will be searched for only in directories named in
 .Fl I

usr.bin/tar/bsdtar.1

@@ -354,9 +354,9 @@ is run as non-root.
 .It Fl Fl numeric-owner
 This is equivalent to
 .Fl Fl uname
-.Qq
+.Qq \&
 .Fl Fl gname
-.Qq .
+.Qq \& .
 On extract, it causes user and group names in the archive
 to be ignored in favor of the numeric user and group ids.
 On create, it causes user and group names to not be stored

usr.sbin/ancontrol/ancontrol.8

@@ -308,7 +308,7 @@ Set a WEP key.
 For 40 bit prefix 10 hex character with 0x.
 For 128 bit prefix 26 hex character with 0x.
 Use
-.Qq
+.Qq \&
 as the key to erase the key.
 Supports 4 keys; even numbers are for permanent keys
 and odd number are for temporary keys.