fix wording

Author: Vladimir Kotal

proc.tex

@@ -1012,7 +1012,7 @@
 was formed, i.e. the first command in the pipeline was created as the last
 process.
 \item However, in \texttt{bash}, all processes in a pipeline are direct children
-of the shell itself, i.e. \texttt{bash} calls \funnm{fork} that many times as is
+of the shell itself, i.e. \texttt{bash} calls \funnm{fork} as many times as is
 the number of programs in the pipeline.  Before the prompt is printed, it waits
 for all processes it directly created to finish.  Another advantage is that
 since a parent can get exit status for its direct children only, forking all