README.md: Add 'Garbled output' to 'Troubleshooting'
As per and this commit clarifies that
`bat` cannot properly handle escape sequences.
@@ -674,6 +674,13 @@ bat() {
## Troubleshooting
+### Garbled output
+
+If an input file contains color codes or other ANSI escape sequences, `bat` will have problems
+performing syntax highlighting and text wrapping, and thus the output can become garbled.
+When displaying such files it is recommended to disable both syntax highlighting and wrapping by
+passing the `--color=never --wrap=never` options to `bat`.
+
### Terminals & colors
`bat` handles terminals *with* and *without* truecolor support. However, the colors in most syntax
