Disallow whitespace in std tag names

src/radish/parser/grammer.g

@@ -9,7 +9,7 @@ tag: std_tag | precondition_tag
 // A standard gherkin Tag in the form of:
 // * @tag
 // * @tag with whitespace
-std_tag: "@" STRING_NO_TAG_NL _NEWLINE?
+std_tag: "@" STRING_NO_WS _NEWLINE?
 
 // A radish Precondition Tag in the form of:
 // * @precondition(feature: scenario)
@@ -96,7 +96,6 @@ BUT: "But "i
 
 // terminals used to match things
 TEXTLINE.0: /.*\n/
-STRING_NO_TAG_NL.0: /[^\n@]/+
 STRING_NO_COLON_NL.0: /[^\n:]/+
 STRING_NO_PAREN_NL.0: /[^\n\)\(]/+
 STRING_NO_NL.0: /[^\n]/+

tests/unit/test_parser.py

@@ -174,22 +174,6 @@ def test_parse_tag_from_a_feature(parser):
     assert ast.tags[0].name == "tag-a"
 
 
-def test_parse_tag_with_spaces_from_a_feature(parser):
-    """The parser should parse a Tag containing spaces from a Feature"""
-    # given
-    feature_file = """
-        @tag - a
-        Feature: My Feature
-    """
-
-    # when
-    ast = parser.parse_contents(None, feature_file)
-
-    # then
-    assert len(ast.tags) == 1
-    assert ast.tags[0].name == "tag - a"
-
-
 def test_parse_tags_on_multiple_lines_from_a_feature(parser):
     """The parser should parse multiple Tags on multiple lines from a Feature"""
     # given
@@ -212,19 +196,17 @@ def test_parse_tags_on_same_line_from_a_feature(parser):
     """The parser should parse multiple Tags on the same line from a Feature"""
     # given
     feature_file = """
-        @tag-a @tag-b @tag - c @tag-d
+        @tag-a @tag-b
         Feature: My Feature
     """
 
     # when
     ast = parser.parse_contents(None, feature_file)
 
     # then
-    assert len(ast.tags) == 4
+    assert len(ast.tags) == 2
     assert ast.tags[0].name == "tag-a"
     assert ast.tags[1].name == "tag-b"
-    assert ast.tags[2].name == "tag - c"
-    assert ast.tags[3].name == "tag-d"
 
 
 def test_parse_tags_on_multiple_and_same_line_from_a_feature(parser):