Remove trailing newline in interactive mode.

redis-cli.c

@@ -439,7 +439,10 @@ static char *prompt(char *line, int size) {
         retval = fgets(line, size, stdin);
     } while (retval && *line == '\n');
 
+    line[strlen(line) - 1] = '\0';
+
     fpurge(stdin);
+
     return retval;
 }