(maint) Additional Editor Service invocation logging

Previously there wasn't a way to know the actual command line
used to start the Editor Services.  This commit modifies the stdio
and tcp handlers to emit a debug log entry with the calculated
command and arguements used to start the editor service.

Author: glennsarti

src/handlers/stdio.ts

@@ -52,6 +52,7 @@ export class StdioConnectionHandler extends ConnectionHandler {
     this.logger.debug(logPrefix + 'Using environment variable RUBYLIB=' + exe.options.env.RUBYLIB);
     this.logger.debug(logPrefix + 'Using environment variable PATH=' + exe.options.env.PATH);
     this.logger.debug(logPrefix + 'Using environment variable RUBYOPT=' + exe.options.env.RUBYOPT);
+    this.logger.debug(logPrefix + 'Editor Services will invoke with: ' + exe.command + ' ' + exe.args.join(' '));
 
     let serverOptions: ServerOptions = {
       run: exe,

src/handlers/tcp.ts

@@ -50,6 +50,7 @@ export class TcpConnectionHandler extends ConnectionHandler {
       let spawn_options: cp.SpawnOptions = {};
       let convertedOptions = Object.assign(spawn_options, exe.options);
 
+      this.logger.debug(logPrefix + 'Editor Services will invoke with: ' + exe.command + ' ' + exe.args.join(' '));
       var proc = cp.spawn(exe.command, exe.args, convertedOptions);
       proc.stdout.on('data', data => {
         if (/LANGUAGE SERVER RUNNING/.test(data.toString())) {