Fix errors in .Xr usage.

PR:             docs/17057
Submitted by:   Submitted by:   Udo Erdelhoff <ue@nathan.ruhr.de>

contrib/amd/amd/amd.8

@@ -274,7 +274,7 @@ If this behavior is not desired, use the
 option.
 .It Fl T Ar tag
 Specify a tag to use with
-.Xr amd.conf 5.
+.Xr amd.conf 5 .
 All Map entries tagged with tag will be processed.   
 Map entries that are not tagged are always processed.
 Map entries that are tagged with a tag other than

lib/libc/gen/getcap.3

@@ -89,7 +89,7 @@ The
 function will first look for files ending in 
 .Nm .db 
 (see
-.Xr cap_mkdb 1) 
+.Xr cap_mkdb 1 ) 
 before accessing the ASCII file.
 .Fa Buf
 must be retained through all subsequent calls to

usr.bin/find/find.1

@@ -63,7 +63,7 @@ The options are as follows:
 The
 .Fl H
 option causes the file information and file type (see
-.Xr stat 2)
+.Xr stat 2 )
 returned for each symbolic link specified on the command line to be 
 those of the file referenced by the link, not the link itself.
 If the referenced file does not exist, the file information and type will
@@ -74,7 +74,7 @@ the command line is that of the link itself.
 The
 .Fl L
 option causes the file information and file type (see
-.Xr stat 2)
+.Xr stat 2 )
 returned for each symbolic link to be those of the file referenced by the
 link, not the link itself.
 If the referenced file does not exist, the file information and type will
@@ -83,7 +83,7 @@ be for the link itself.
 The
 .Fl P
 option causes the file information and file type (see
-.Xr stat 2)
+.Xr stat 2 )
 returned for each symbolic link to be those of the link itself.
 This is the default.
 .It Fl X

usr.bin/make/make.1

@@ -70,7 +70,7 @@ will be read for this list of specifications.
 If the file
 .Ql Pa .depend
 can be found, it is also read (see
-.Xr mkdep 1) .
+.Xr mkdep 1 ) .
 .Pp
 This manual page is intended as a reference document only.
 For a more thorough introduction to