Example textual diffing tools.
REF: Binary Diffing Examples here
code --diff file1.txt file1_changed.txt
Beyond Compare also allows directory comparisons.
bcompare file1.txt file1_changed.txt
Meld is a tool for comparing files and directories, and for resolving differences between them.
meld ./12_threejs ./13_sales_dashboard/
# changed (detects diff)
diff file1.txt file1_changed.txt
# extended test (detects diff)
diff file1.txt file1_extended.txt
# truncated test (detects diff)
diff file1.txt file1_truncated.txt