feat: improve Nextflow language support

Add triple-double, triple-single, and single quote support to the
Nextflow language definition. This fixes miscounting of comment-like
content inside process script blocks (e.g. """...""" heredocs).

Also adds nextflow.config as a recognized filename and removes the
unused "nextflow" extension (Nextflow files use .nf).

Rewrites the test file as a DSL2 pipeline exercising all quote and
comment variants.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kenibrewer

languages.json

@@ -1206,8 +1206,9 @@
     "Nextflow": {
       "line_comment": ["//"],
       "multi_line_comments": [["/*", "*/"]],
-      "quotes": [["\\\"", "\\\""]],
-      "extensions": ["nextflow", "nf"]
+      "quotes": [["\\\"\\\"\\\"", "\\\"\\\"\\\""], ["'''", "'''"], ["\\\"", "\\\""], ["'", "'"]],
+      "extensions": ["nf"],
+      "filenames": ["nextflow.config"]
     },
     "Nim": {
       "line_comment": ["#"],

tests/data/nextflow.nf

@@ -1,18 +1,42 @@
-/* 18 lines 10 code 5 comments 3 blanks */
+// 42 lines 28 code 5 comments 9 blanks
 
 /*
-Nextflow - hello
-*/
+ * Multi-line block comment
+ */
 
-// comment
-cheers = Channel.from 'Bonjour', 'Ciao', 'Hello', 'Hola'
+// Single line comment
+nextflow.enable.dsl = 2
+
+params.greeting = 'Hello'
+params.name = "World"
 
 process sayHello {
-  echo true
-  input: 
-    val x from cheers
-  script:
+    input:
+    val greeting
+    val name
+
+    output:
+    stdout
+
+    script:
     """
-    echo '$x world!'
+    echo '${greeting}, ${name}!'
+    echo "// this is not a comment"
+    echo '/* also not a comment */'
     """
 }
+
+process farewell {
+    output:
+    stdout
+
+    script:
+    '''
+    echo 'Goodbye!'
+    '''
+}
+
+workflow {
+    sayHello(params.greeting, params.name) | view
+    farewell() | view
+}