Merge branch 'master' into release-3.0.0

2 files changed, 7 insertions, 3 deletions

diff --git a/lib/axlsx.rb b/lib/axlsx.rb
index 387a8b89..23fc6c8b 100644
--- a/lib/axlsx.rb
+++ b/lib/axlsx.rb
@@ -135,8 +135,12 @@ module Axlsx
   # @param [String] str The string to process
   # @return [String]
   def self.sanitize(str)
-    str.delete!(CONTROL_CHARS)
-    str
+    if str.frozen?
+      str.delete(CONTROL_CHARS)
+    else
+      str.delete!(CONTROL_CHARS)
+      str
+    end
   end
 
   # If value is boolean return 1 or 0
diff --git a/lib/axlsx/stylesheet/styles.rb b/lib/axlsx/stylesheet/styles.rb
index c7283324..2460ab10 100644
--- a/lib/axlsx/stylesheet/styles.rb
+++ b/lib/axlsx/stylesheet/styles.rb
@@ -128,7 +128,7 @@ module Axlsx
     # @option options [Boolean] i Indicates if the text should be italicised
     # @option options [Boolean] u Indicates if the text should be underlined
     # @option options [Boolean] strike Indicates if the text should be rendered with a strikethrough
-    # @option options [Boolean] strike Indicates if the text should be rendered with a shadow
+    # @option options [Boolean] shadow Indicates if the text should be rendered with a shadow
     # @option options [Integer] charset The character set to use.
     # @option options [Integer] family The font family to use.
     # @option options [String] font_name The name of the font to use