fixed regex (\b matches non-ascii letters)

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 3.7)
 include(GNUInstallDirs)
 
 project (rss2mastodon
-         VERSION 0.1.5
+         VERSION 0.1.6
          LANGUAGES CXX
 )
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wall")

src/rss2mastodon.cpp

@@ -143,7 +143,7 @@ std::vector<string> parse_website(const string &profile, const string &xml)
 
                 for (const string &hashtag : watchwords)
                 {
-                    std::regex rehashtag("\\b(" + hashtag + ")\\b",
+                    std::regex rehashtag("[[:space:][:punct:]](" + hashtag + ")[[:space:][:punct:]]",
                                          std::regex_constants::icase);
                     str = std::regex_replace(str, rehashtag, "#$1",
                                              std::regex_constants::format_first_only);