PR #173 - Fix incorrect info about bc

notebooks/Fuzzer.ipynb

@@ -1201,7 +1201,7 @@
    "source": [
     "## Bugs Fuzzers Find\n",
     "\n",
-    "When Miller and his students ran their first fuzzers in 1989, they found an alarming result: About **a third of the UNIX utilities** they fuzzed had issues – they crashed, hung, or otherwise failed when confronted with fuzzing input \\cite{Miller1990}.  This also included the `bc` program, above.  (Apparently, the bugs have now been fixed!)\n",
+    "When Miller and his students ran their first fuzzers in 1989, they found an alarming result: About **a third of the UNIX utilities** they fuzzed had issues – they crashed, hung, or otherwise failed when confronted with fuzzing input \\cite{Miller1990}.  This also included the `bc` program, above.  (The `bc` above is a [modern reimplementation](https://git.gavinhoward.com/gavin/bc) whose author is a [staunch believer in fuzzing](https://git.gavinhoward.com/gavin/bc/src/branch/master/tests/fuzzing)!)\n",
     "\n",
     "Considering that many of these UNIX utilities were used in scripts that would also process network input, this was an alarming result.  Programmers quickly built and ran their own fuzzers, rushed to fix the reported errors, and learned not to trust external inputs anymore."
    ]