Fix on_sheet_opened called twice from uri_handler

docs/src/migrating_to_lsp_plugin.md

@@ -435,7 +435,7 @@ from LSP.plugin import uri_handler
 def on_open_foo_uri(self, uri: DocumentUri, flags: sublime.NewFileFlags) -> Promise[sublime.Sheet | None]:
     title, content, syntax = render_foo_uri(uri)
     if session := self.weaksession():
-        return session.open_scratch_buffer(title, content, syntax, uri, None, flags)
+        return session.open_scratch_buffer(title, content, syntax, uri, None, flags).then(_: None)
     return Promise.resolve(None)
 ```
 

plugin/core/sessions.py

@@ -172,6 +172,7 @@
 from typing import Union
 from typing_extensions import TypeAlias
 from typing_extensions import TypeGuard
+from urllib.parse import urldefrag
 from weakref import WeakSet
 import itertools
 import mdpopups
@@ -1578,7 +1579,8 @@ def _on_sheet_opened(
         self, sheet: sublime.Sheet | None, uri: DocumentUri, r: Range | None
     ) -> Promise[sublime.View | None]:
         if sheet and (view := sheet.view()):
-            view.settings().set('lsp_uri', uri)  # Preserve original URI given by the language server
+            uri_no_fragment = urldefrag(uri).url
+            view.settings().set('lsp_uri', uri_no_fragment)
             if r:
                 center_selection(view, r)
             return Promise.resolve(view)