Merge pull request rails#4753 from rahul100885/rahul100885_work

Used block to make sure file get auto closed after use

Author: spastorino

railties/lib/rails/code_statistics.rb

@@ -37,24 +37,26 @@ def calculate_directory_statistics(directory, pattern = /.*\.rb$/)
 
         next unless file_name =~ pattern
 
-        f = File.open(directory + "/" + file_name)
         comment_started = false
-        while line = f.gets
-          stats["lines"]     += 1
-          if(comment_started)
-            if line =~ /^=end/
-              comment_started = false
-            end
-            next
-          else
-            if line =~ /^=begin/
-              comment_started = true
+        
+        File.open(directory + "/" + file_name) do |f|
+          while line = f.gets
+            stats["lines"]     += 1
+            if(comment_started)
+              if line =~ /^=end/
+                comment_started = false
+              end
               next
+            else
+              if line =~ /^=begin/
+                comment_started = true
+                next
+              end
             end
+            stats["classes"]   += 1 if line =~ /^\s*class\s+[_A-Z]/
+            stats["methods"]   += 1 if line =~ /^\s*def\s+[_a-z]/
+            stats["codelines"] += 1 unless line =~ /^\s*$/ || line =~ /^\s*#/
           end
-          stats["classes"]   += 1 if line =~ /^\s*class\s+[_A-Z]/
-          stats["methods"]   += 1 if line =~ /^\s*def\s+[_a-z]/
-          stats["codelines"] += 1 unless line =~ /^\s*$/ || line =~ /^\s*#/
         end
       end