Fix a problem with last commit
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 # bc
 
 This is an implementation of POSIX `bc` that implements
-[GNU `bc`}(https://www.gnu.org/software/bc/) extensions.
+[GNU `bc`](https://www.gnu.org/software/bc/) extensions.
 
 Because this `bc` makes use of [`arbprec`](https://github.com/cmgraff/arbsh) by
 [cmgraff](https://github.com/cmgraff) and [hexingb](https://github.com/hexingb)