Update README.md

Author: pokey

packages/cursorless-org-docs/src/docs/user/README.md

@@ -310,7 +310,7 @@ The modifiers `"head"` and `"tail"` can be used to expand a target through the b
 - `"take head air"`: selects the mark through to start of the line
 - `"take tail air"`: selects the mark through to the end of the line
 
-When inside a single line surrounding pair(parentheses, brackets, etc) the head/tail modifier will only expand to the interior of that pair instead of the whole line. You can explicitly say `"head line"` or `"tail line"` to get the line behavior.
+When inside a single-line surrounding pair (eg parentheses, brackets, etc) the head/tail modifier will only expand to the interior of that pair instead of the whole line. You can explicitly say `"head line"` or `"tail line"` to get the line behavior.
 
 When followed by a modifier, they will expand their input to the start or end of the given modifier range. For example: