Fix list formatting for known issues in README

1 files changed, 9 insertions, 10 deletions

diff --git a/README.md b/README.md
index f0218e1e..8a746db6 100644
--- a/README.md
+++ b/README.md
@@ -231,16 +231,15 @@ related to themes, which axlsx does not implement at this time.
    - you must set 'use_shared_strings' to true. This is most
      conveniently done just before rendering by calling Package.use_shared_strings = true prior to serialization.
 
-```ruby
-p = Axlsx::Package.new
-p.workbook.add_worksheet(:name => "Basic Worksheet") do |sheet|
-  sheet.add_row ["First Column", "Second", "Third"]
-  sheet.add_row [1, 2, 3]
-end
-p.use_shared_strings = true
-p.serialize('simple.xlsx')
-```
-
+  ```ruby
+  p = Axlsx::Package.new
+  p.workbook.add_worksheet(:name => "Basic Worksheet") do |sheet|
+    sheet.add_row ["First Column", "Second", "Third"]
+    sheet.add_row [1, 2, 3]
+  end
+  p.use_shared_strings = true
+  p.serialize('simple.xlsx')
+  ```
    - charts do not render