Fix #676: Trying to keep current formatting intact

Author: Gal Falkon

src/common/mdh-html-to-text.js

@@ -105,6 +105,14 @@ MdhHtmlToText.prototype._preprocess = function() {
   // to remain intact.
   this.excludeTagBlocks('blockquote', true);
 
+  // Trying to keep current formatting intact (see issue #676)
+  for (const tagName of ['b','i','u','strike']) {
+    this.preprocessInfo.html = this.preprocessInfo.html.replace(
+      new RegExp(`<${tagName}>(.*?)<\/${tagName}>`, 'ig'),
+      `&lt;${tagName}&gt;$1&lt;\/${tagName}&gt;`
+    );
+  }
+
   // Try to leave intact the line that Gmail adds that says:
   //   On such-a-date, such-a-person <email addy> wrote:
   this.preprocessInfo.html = this.preprocessInfo.html.replace(