Improve documentation for -autoexpandIgnore

README.md

@@ -139,9 +139,9 @@ twf path/to/subdir/file
 ### Flags
 
 - `-autoexpandDepth <depth>`: Depth to which directories should be automatically expanded at startup. If `-1`, depth is unlimited. The default is `1`, meaning only the root should be expanded.
-- `-autoexpandIgnore <regexp>`: Regular expression matching relative paths to ignore when auto-expanding directories at startup.
+- `-autoexpandIgnore <regexp>`: Regular expression matching paths to ignore when auto-expanding directories at startup. The path that' tested against the regex is relative to the twf root and does not begin with `/` or `./`.
 
-  For example, `^\.git|internal/filetree/testdata$` would ignore the `.git` directory at the root level as well as the `internal/filetree/testdata` directory.
+  For example, `^(\.git|internal/filetree/testdata)$` would ignore the `.git` directory at the root level as well as the `internal/filetree/testdata` directory.
 
 - `-bind <keybindings>`: Keybindings for command sequences.