fix C-style

Author: Vladimir Kotal

file-api.tex

@@ -652,19 +652,19 @@
 
 \begin{alltt}
 close(1);
-if((fd = open("out", O\_WRONLY | O\_CREAT | O\_TRUNC, 0666)) == 0)
+if ((fd = open("out", O\_WRONLY | O\_CREAT | O\_TRUNC, 0666)) == 0)
         dup(0);
 close(2);
 dup(1);
-if(fd == 0)
+if (fd == 0)
         close(0);
 \end{alltt}
 
 or
 
 \begin{alltt}
 fd = open("out", O\_WRONLY | O\_CREAT | O\_TRUNC, 0666);
-if(fd != 1) \{
+if (fd != 1) \{
         dup2(fd, 1);
         close(fd);
 \}