Merge pull request #2679 from SillyTavern/codeblock-underscores

Don't replace underscore italics inside of code blocks

public/scripts/showdown-underscore.js

@@ -7,9 +7,19 @@ export const markdownUnderscoreExt = () => {
         }
 
         return [{
-            type: 'lang',
-            regex: new RegExp('\\b(?<!_)_(?!_)(.*?)(?<!_)_(?!_)\\b', 'g'),
-            replace: '<em>$1</em>',
+            type: 'output',
+            regex: new RegExp('(<code>[\\s\\S]*?<\\/code>)|(?<!\\S)_(?!_)([^_\\n]+?)(?<!_)_(?!\\w)', 'g'),
+            replace: function(match, codeContent, italicContent) {
+                if (codeContent) {
+                    // If it's inside <code> tags, return unchanged
+                    return match;
+                } else if (italicContent) {
+                    // If it's an italic group, apply the replacement
+                    return '<em>' + italicContent + '</em>';
+                }
+                // If none of the conditions are met, return the original match
+                return match;
+            },
         }];
     } catch (e) {
         console.error('Error in Showdown-underscore extension:', e);