test that git is available (#4)

Author: mythmon

tests/text-manip.test.ts renamed to tests/editing-tools.test.ts

@@ -3,6 +3,7 @@ import { binaryOnPathTest } from "./index.ts";
 const textManipTools: { binary: string }[] = [
   { binary: "ag" },
   { binary: "awk" },
+  { binary: "git" },
   { binary: "grep" },
   { binary: "nano" },
   { binary: "rg" },