Fix the prerequisite information.

Author: janpgit

posters/unix-poster-AR-2018.roff

@@ -46,19 +46,20 @@ http://mff.devnull.cz
 environment using the C programming language.
 .sp 0.4c
 .ti -0.19i
-\(bu\ \ A part of the course is a hands-on seminar focusing on practical
-programming in C in the Unix/Linux environment.
+\(bu\ \ The course includes laboratory work where all the knowledge gained in
+the lectures is practiced.
 .sp 0.4c
 .ti -0.19i
 \(bu\ \ \f(ABLectured in English\fP to accomodate non-Czech speaking students.
 .sp 0.4c
 .ti -0.19i
 .\"(bu\ \ MFF UK, Mal\['a] Strana, winter semester 2018, \f(ABroom SU2\fP, \f(ABWed 9:00\fP.
-\(bu\ \ MFF UK, Mal\['a] Strana, winter semester 2018.  Schedule is TBD.
+\(bu\ \ MFF UK, Mal\['a] Strana, \f(ABwinter semester 2018/2019.\fP  Schedule is TBD.
 .sp 0.4c
 .ti -0.19i
-\(bu\ \ As a prerequisite, you should be either able to write in C
-(NPRG\%066) or willing to learn it by yourself.
+\(bu\ \ As a prerequisite, you are expected to have passed \f(AIIntroduction to
+UNIX\fP (NSWI095) and you should be either able to write in C (NPRG\%066) or
+willing to learn it by yourself.
 .sp 0.4c
 .ti -0.19i
 \(bu\ \ Let us know if you have any questions: vlada@dev\%null.cz, jp@devnull.cz