remove extra whitespace

Author: Vladimir Kotal

intro.tex

@@ -201,7 +201,7 @@
 Specification (2003). The SUS interface tables are here:
 \url{http://www.unix.org/version3/inttables.pdf}
 \item Commercial UNIXes largely follow the Single UNIX Specification, compliance
-to this standard is the condition to use the UNIX trademark 
+to this standard is the condition to use the UNIX trademark
 (the UNIX 98 brand corresponds to SUSv2, UNIX 03 corresponds to SUSv3, SUSv4 is
 UNIX V7 - do not mix it up with historical V7 UNIX). It is built on the POSIX
 base.
@@ -934,7 +934,7 @@
 {
         return (0);
 }
-$ c89 basic-utils/standards.c 
+$ c89 basic-utils/standards.c
 "/usr/include/sys/feature_tests.h", line 336: #error: "Compiler or
 options invalid; UNIX 03 and POSIX.1-2001 applications require
 the use of c99"