Move function declaration to top-level

Gets rid of a strict mode error and a few levels of indentation.

lib/readline.js

@@ -346,8 +346,35 @@ Interface.prototype._tabComplete = function() {
           return a.length > b.length ? a : b;
         }).length + 2;  // 2 space padding
         var maxColumns = Math.floor(self.columns / width) || 1;
+        var group = [], c;
+        for (var i = 0, compLen = completions.length; i < compLen; i++) {
+          c = completions[i];
+          if (c === '') {
+            handleGroup.call(self, group);
+            group = [];
+          } else {
+            group.push(c);
+          }
+        }
+        handleGroup.call(self, group);
 
+        // If there is a common prefix to all matches, then apply that
+        // portion.
+        var f = completions.filter(function(e) { if (e) return e; });
+        var prefix = commonPrefix(f);
+        if (prefix.length > completeOn.length) {
+          self._insertString(prefix.slice(completeOn.length));
+        }
+
+      }
+      self._refreshLine();
+    }
+  });
+};
+
+// this = Interface instance
 function handleGroup(group) {
+  var self = this;
   if (group.length == 0) {
     return;
   }
@@ -372,33 +399,6 @@ Interface.prototype._tabComplete = function() {
   self.output.write('\r\n');
 }
 
-        var group = [], c;
-        for (var i = 0, compLen = completions.length; i < compLen; i++) {
-          c = completions[i];
-          if (c === '') {
-            handleGroup(group);
-            group = [];
-          } else {
-            group.push(c);
-          }
-        }
-        handleGroup(group);
-
-        // If there is a common prefix to all matches, then apply that
-        // portion.
-        var f = completions.filter(function(e) { if (e) return e; });
-        var prefix = commonPrefix(f);
-        if (prefix.length > completeOn.length) {
-          self._insertString(prefix.slice(completeOn.length));
-        }
-
-      }
-      self._refreshLine();
-    }
-  });
-};
-
-
 function commonPrefix(strings) {
   if (!strings || strings.length == 0) {
     return '';