Update README.md

Co-authored-by: Jens Wille <[email protected]>

Author: dr0i

README.md

@@ -717,7 +717,7 @@ Encodes a field value as URI. Aka percent-encoding.
 
 Options:
 
-- `plus_for_space`: Sets whether "space" (' ') will be substituted by a "plus" ('+') or be percent escaped ('%20'). Default: `true`)
+- `plus_for_space`: Sets whether "space" (` `) will be substituted by a "plus" (`+`) or be percent escaped (`%20`). (Default: `true`)
 - `safe_chars`: Sets characters that won't be escaped. Safe characters are the
 ranges 0..9, a..z and A..Z. These are always safe and should not be specified.
 Default safe characters are also ".", "-", "*", and "_".