Fix newline checks in parser (#1328)

pkl-core/src/test/files/LanguageSnippetTests/input/errors/binopDifferentLine.pkl

@@ -0,0 +1,5 @@
+binop_result: Int = 1 
+
+/*comment*/- 
+  
+/*comment*/ 1

pkl-core/src/test/files/LanguageSnippetTests/output/errors/binopDifferentLine.err

@@ -0,0 +1,6 @@
+–– Pkl Error ––
+Invalid token at position. Expected a class, typealias, method, or property.
+
+x | /*comment*/-
+               ^
+at binopDifferentLine (file:///$snippetsDir/input/errors/binopDifferentLine.pkl)

pkl-parser/src/main/java/org/pkl/parser/Parser.java

@@ -1811,11 +1811,13 @@ public class Parser {
   private FullToken forceNext() {
     var tk = lexer.next();
     precededBySemicolon = false;
+    var newLines = lexer.newLinesBetween;
     while (tk.isAffix()) {
       precededBySemicolon = precededBySemicolon || tk == Token.SEMICOLON;
       tk = lexer.next();
+      newLines += lexer.newLinesBetween;
     }
-    return new FullToken(tk, lexer.span(), lexer.newLinesBetween);
+    return new FullToken(tk, lexer.span(), newLines);
   }
 
   // Like next, but don't ignore comments

pkl-parser/src/test/kotlin/org/pkl/parser/ParserComparisonTest.kt

@@ -93,6 +93,7 @@ class ParserComparisonTest {
         "stringError1.pkl",
         "annotationIsNotExpression2.pkl",
         "amendsRequiresParens.pkl",
+        "errors/binopDifferentLine.pkl",
         "errors/parser18.pkl",
         "errors/nested1.pkl",
         "errors/invalidCharacterEscape.pkl",