Account for develop/master branch paths in docs version alert regex (boostorg#1984) (boostorg#1985)

Author: daveoconnor

libraries/mixins.py

@@ -42,7 +42,7 @@ def get_context_data(self, **kwargs):
             current_version_kwargs.update(
                 {
                     "content_path": re.sub(
-                        r"([_0-9]+)/(\S+)",
+                        r"([_0-9]+|master|develop)/(\S+)",
                         rf"{LATEST_RELEASE_URL_PATH_STR}/\2",
                         current_version_kwargs.get("content_path"),
                     )

versions/models.py

@@ -326,5 +326,8 @@ def docs_path_to_boost_name(content_path):
     Convert a documentation content path to the Boost version name.
     e.g. "1_79_0/doc/html/accumulators.html" to "boost-1.79.0"
     """
-    result = re.sub(r"^([_0-9]+)(/\S+)", r"boost-\1", content_path)
+    if content_path.startswith("develop") or content_path.startswith("master"):
+        result = content_path.split("/")[0]
+    else:
+        result = re.sub(r"^([_0-9]+)(/\S+)", r"boost-\1", content_path)
     return result.replace("_", ".")