Update cheatsheets

tldr/ispell

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# ispell
+
+> Interactive spell checking.
+> More information: <https://www.cs.hmc.edu/~geoff/ispell-man.html>.
+
+- Start an interactive session:
+
+`ispell`
+
+- Check for typos in the specified file and interactively apply suggestions:
+
+`ispell {{path/to/file}}`
+
+- Display version:
+
+`ispell -v`