Removed trailing white space at end of lines

man1/intro.1

@@ -217,7 +217,7 @@ only the last component.
 That is why
 .I /home/aeb/tel
 can be abbreviated
-to 
+to
 .I tel
 when the current directory is
 .IR /home/aeb .

man2/ioctl_list.2

@@ -475,7 +475,7 @@ l l l l.
 0x000089E1	SIOCGETSGCNT	struct sioc_sg_req *	// I-O
 .TE
 
-// <include/linux/msdos_fs.h> see 
+// <include/linux/msdos_fs.h> see
 .BR ioctl_fat (2)
 .TS
 l l l l.

man7/nptl.7

@@ -85,7 +85,7 @@ change process credentials with functions that,
 in addition to invoking the underlying system call,
 arrange for all other threads in the process to also change their credentials.
 
-The implementation of each of these system calls involves the use of 
+The implementation of each of these system calls involves the use of
 a real-time signal that is sent (using
 .BR tgkill (2))
 to each of the other threads that must change its credentials.

man7/user_namespaces.7

@@ -626,7 +626,7 @@ capability in the parent user namespace.
 .\" ============================================================
 .\"
 .SS The /proc/[pid]/setgroups file
-.\" 
+.\"
 .\" commit 9cc46516ddf497ea16e8d7cb986ae03a0f6b92f8
 .\" commit 66d2f338ee4c449396b6f99f5e75cd18eb6df272
 .\" http://lwn.net/Articles/626665/