add link to ganache.dev in help output

Author: davidmurdoch

packages/core/lib/command-utils.js

@@ -324,7 +324,9 @@ const displayGeneralHelp = options => {
         OS.EOL +
         "Usage: truffle <command> [options]"
     )
-    .epilog("See more at http://trufflesuite.com/docs")
+    .epilog("See more at https://trufflesuite.com/docs/" + 
+      OS.EOL +
+      "For Ethereum JSON-RPC documentation see https://ganache.dev")
     // showHelp prints using console.error, this won't log in a
     // child process - "log" forces it to use console.log instead
     .showHelp("log");

packages/truffle/test/scenarios/commands/help.js

@@ -16,6 +16,13 @@ describe("truffle help [ @standalone ]", function () {
       const output = logger.contents();
       assert(output.includes("Usage: truffle <command> [options]"));
     });
+
+    it("includes link to https://ganache.dev", async function () {
+      this.timeout(10000);
+      await CommandRunner.run("help", config);
+      const output = logger.contents();
+      assert(output.includes("For Ethereum JSON-RPC documentation see https://ganache.dev"));
+    });
   });
 
   describe("when run with an argument", function () {