wc: read helper-3.txt via stdin to suppress filenames

Use input redirection in script-01.sh and script-02.sh so wc reads
from stdin (e.g. `wc -w < ../helper-files/helper-3.txt` and
`wc -l < ../helper-files/helper-3.txt`). This prevents wc from
printing the filename and returns only the count.

Author: Iswanna

individual-shell-tools/wc/script-01.sh

@@ -5,4 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output the number of words in the file helper-files/helper-3.txt.
 # The output should include the number 19. The output should not include the number 92.
 
-wc -w ../helper-files/helper-3.txt
+wc -w < ../helper-files/helper-3.txt

individual-shell-tools/wc/script-02.sh

@@ -5,4 +5,4 @@ set -euo pipefail
 # TODO: Write a command to output the number of lines in the file helper-files/helper-3.txt.
 # The output should include the number 3. The output should not include the number 19.
 
-wc -l ../helper-files/helper-3.txt
+wc -l < ../helper-files/helper-3.txt