code: function changeLog() {
  			// Generate change log for release using all messages since last
  			// tag/release
  			if (!options.chgLog) {
  				if (options.chgLogRequired) {
  					throw new Error('Invalid "options.chgLog": "' + options.chgLog + '" ("options.chgLogRequired": '
  							+ options.chgLogRequired + '"');
  				}
  				return;
  			}
  			var chgLogPath = path.join(options.distDir, options.chgLog);
  			var lastGitLog = commit.prev && !commit.prev.versionVacant() ? commit.prev.versionTag + '..HEAD' : 'HEAD';
  			chgLogRtn = cmd('git --no-pager log ' + lastGitLog + ' --pretty=format:"' + options.chgLogLineFormat
  					+ '" > ' + chgLogPath, null, false, chgLogPath, options.chgLogSkipRegExps, '<!-- Commit '
  					+ commit.hash + ' -->\n')
  					|| '';
  			utils.validateFile(chgLogPath, rollCall);
  		}
docs: Generates/Writes a change log for the current release using all
  messages since last tag/release