Update cheatsheets

tldr/wdiff

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# wdiff
+
+> Display word differences between text files.
+> More information: <https://www.gnu.org/software/wdiff/>.
+
+- Compare two files:
+
+`wdiff {{path/to/file1}} {{path/to/file2}}`
+
+- Ignore case when comparing:
+
+`wdiff --ignore-case {{path/to/file1}} {{path/to/file2}}`
+
+- Display how many words are deleted, inserted or replaced:
+
+`wdiff --statistics {{path/to/file1}} {{path/to/file2}}`