fix: dot in flag identifier (#250)

Fixes #249

Author: blindFS

grammar.js

@@ -119,7 +119,7 @@ module.exports = grammar({
     identifier: _ => _identifier_rules(false),
 
     long_flag_identifier: _ =>
-      token.immediate(/[0-9\p{XID_Start}_][\p{XID_Continue}?_-]*/u),
+      token.immediate(/[0-9\p{XID_Start}_][\p{XID_Continue}?._-]*/u),
 
     _command_name: $ =>
       choice(

script/known-failures.txt

@@ -21,6 +21,7 @@ examples/nu_scripts/custom-completions/pytest/pytest-completions.nu
 examples/nu_scripts/custom-menus/current_session_history_menu.nu
 examples/nu_scripts/example-config/init.nu
 examples/nu_scripts/make_release/gen-ts-ext.nu
+examples/nu_scripts/make_release/twin-tweaks.nu
 examples/nu_scripts/make_release/notes/tools.nu
 examples/nu_scripts/modules/duplicates/example.nu
 examples/nu_scripts/modules/kubernetes/complete.nu

src/grammar.json

@@ -217,6 +217,8 @@ cmd-010-long-flag
 ======
 
 cmd --long-flag --42
+# issue 249
+curl --tlsv1.2
 
 ------
 
@@ -227,6 +229,13 @@ cmd --long-flag --42
         (cmd_identifier)
         (long_flag
           (long_flag_identifier))
+        (long_flag
+          (long_flag_identifier)))))
+  (comment)
+  (pipeline
+    (pipe_element
+      (command
+        (cmd_identifier)
         (long_flag
           (long_flag_identifier))))))