[api] Added ability to specify column spacing for rows. Colors are no…

…w optional for column headers. Column header colors can now fallback gracefully / inherit from the last column color.

lib/cliff.js

@@ -107,19 +107,26 @@ cliff.arrayLengths = function (arrs) {
 // Outputs the specified `rows` as fixed-width columns, adding
 // colorized headers if `colors` are supplied.
 //
-cliff.stringifyRows = function (rows, colors) {
+cliff.stringifyRows = function (rows, colors, options) {
   var lengths, columns, output = [], headers;
-
+
+  options = options || {};
+  options.columnSpacing = options.columnSpacing || 2;
+
   columns = cliff.columnMajor(rows);
   lengths = cliff.arrayLengths(columns);
-  
+
   function stringifyRow(row, colorize) {
     var rowtext = '', padding, item, i, length;
     for (i = 0; i < row.length; i += 1) {
       item = cliff.stringifyLiteral(row[i]);
-      item = colorize ? item[colors[i]] : item;
+
+      if(colorize) {
+        item = item[colors[i]] || item[colors[colors.length -1]] || item;
+      }
+
       length = realLength(item);
-      padding = length < lengths[i] ? lengths[i] - length + 2 : 2;
+      padding = length < lengths[i] ? lengths[i] - length + options.columnSpacing  : options.columnSpacing ;
       rowtext += item + new Array(padding).join(' ');
     }
 
@@ -148,12 +155,12 @@ cliff.stringifyRows = function (rows, colors) {
 // Extracts the lists of `properties` from the specified `objs`
 // and formats them according to `cliff.stringifyRows`.
 //
-cliff.stringifyObjectRows = cliff.rowifyObjects = function (objs, properties, colors) {
+cliff.stringifyObjectRows = cliff.rowifyObjects = function (objs, properties, colors, options) {
   var rows = [properties].concat(objs.map(function (obj) {
     return cliff.extractFrom(obj, properties);
   }));
 
-  return cliff.stringifyRows(rows, colors);
+  return cliff.stringifyRows(rows, colors, options);
 };
 
 //