Fixed FrozenError

In some documents, latexmath will appear in text passed to `handle_inline_stem` as a frozen string. By changing line 135 to include `text = text.gsub(stem_rx)` instead of `text.gsub!(stem_rx)`, this error no longer occurs.
asciidoctor · May 16, 2019 · e26c6ba · e26c6ba
1 parent 242e250
commit e26c6ba
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/asciidoctor-mathematical/extension.rb b/lib/asciidoctor-mathematical/extension.rb
@@ -132,7 +132,7 @@ def handle_inline_stem(node, text, mathematical, image_output_dir, image_target_
 
     source_modified = false
     # TODO skip passthroughs in the source (e.g., +stem:[x^2]+)
-    text.gsub!(stem_rx) {
+    text = text.gsub(stem_rx) {
       if (m = $~)[0].start_with? '\\'
         next m[0][1..-1]
       end