clearer output for fields with spaces or empty string in bunyan cli output

CHANGES.md

@@ -2,7 +2,11 @@
 
 ## bunyan 0.6.3 (not yet released)
 
-(nothing yet)
+- `bunyan` cli output: clarify extra fields with quoting if empty or have
+  spaces. E.g. 'cmd' and 'stderr' in the following:
+
+        [2012-02-12T00:30:43.736Z] INFO: mo-docs/43194 on banana.local: buildDocs results (req_id=185edca2-2886-43dc-911c-fe41c09ec0f5, route=PutDocset, error=null, stderr="", cmd="make docs")
+
 
 ## bunyan 0.6.2
 

bin/bunyan

@@ -381,11 +381,16 @@ function handleLogLine(line, opts) {
       var key = leftover[i];
       var value = rec[key];
       var type = typeof(value);
+      var stringified = false;
       if (typeof(value) !== 'string') {
         value = JSON.stringify(value, null, 2);
+        stringified = true;
       }
       if (value.indexOf('\n') !== -1 || value.length > 50) {
         details.push(indent(key + ': ' + value))
+      } else if (!stringified && (value.indexOf(' ') != -1 ||
+                                  value.length === 0)) {
+        extras.push(key + '=' + JSON.stringify(value))
       } else {
         extras.push(key + '=' + value)
       }