Fix bug introduced with diff-lcs support

Author: agardiner

.gitignore

@@ -1,4 +1,5 @@
 .DS_Store
 doc
 pkg
+test
 .yardoc

lib/csv-diff-report/html.rb

@@ -1,5 +1,8 @@
 require 'cgi'
-require 'lcs-diff' rescue nil
+begin
+    require 'lcs-diff'
+rescue LoadError
+end
 
 
 class CSVDiff
@@ -171,7 +174,7 @@ def html_diff(body, file_diff)
                     body << '<td>'
                     if style == 'update' && @lcs_available && old && new && (old.to_s.lines.count > 1 || new.to_s.lines.count > 1)
                         body << '<code>'
-                        Diff::LCS.diff(old.lines, new.lines).each_with_index |chg_set, j|
+                        Diff::LCS.diff(old.lines, new.lines).each_with_index do |chg_set, j|
                             body << '...' unless j == 0
                             chg_set.each do |lcs_diff|
                                 body << "#{lcs_diff.position}&nbsp;&nbsp;<span class='#{