These are just parens.

licenses/lgpl-v2.1.txt

@@ -34,9 +34,9 @@ forbidden:
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
-[This is the first released version of the Lesser GPL.  It also counts
+(This is the first released version of the Lesser GPL.  It also counts
  as the successor of the GNU Library Public License, version 2, hence
- the version number 2.1.]
+ the version number 2.1.)
 
                             Preamble