Fix safe Style/Lambda offenses

- Use literal syntax on single line
- Use lambda method on multiple lines

Ref: https://rubystyle.guide/#lambda-multi-line

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/axlsx/stylesheet/styles.rb b/lib/axlsx/stylesheet/styles.rb
index bdda36c7..d9c5683a 100644
--- a/lib/axlsx/stylesheet/styles.rb
+++ b/lib/axlsx/stylesheet/styles.rb
@@ -380,7 +380,7 @@ module Axlsx
         end
       end
 
-      validate_border_hash = ->(val) {
+      validate_border_hash = lambda { |val|
         unless val.key?(:style) && val.key?(:color)
           raise ArgumentError, format(ERR_INVALID_BORDER_OPTIONS, options[:border])
         end