Improve doc comments

and fix repltests

Author: odersky

compiler/src/dotty/tools/dotc/parsing/Parsers.scala

@@ -312,7 +312,13 @@ object Parsers {
       if in.isNewLine then in.nextToken() else accept(SEMI)
 
     /** Parse statement separators and end markers. Ensure that there is at least
-     *  one statement separator unless the next token terminates a statement sequence.
+     *  one statement separator unless the next token terminates a statement´sequence.
+     *  @param   stats      the statements parsed to far
+     *  @param   noPrevStat true if there was no immediately preceding statement parsed
+     *  @param   what       a string indicating what kin of statement is parsed
+     *  @param   altEnd     a token that is also considered as a terminator of the statement
+     *                      sequence (the default `EOF` already assumes to terminate a statement
+     *                      sequence).
      *  @return  true if the statement sequence continues, false if it terminates.
      */
     def statSepOrEnd[T <: Tree](stats: ListBuffer[T], noPrevStat: Boolean = false, what: String = "statement", altEnd: Token = EOF): Boolean =

compiler/test-resources/repl/i6676

@@ -2,9 +2,6 @@ scala> xml"
 1 | xml"
   |    ^
   |    unclosed string literal
-1 | xml"
-  |     ^
-  |     ';' expected, but eof found
 scala> xml""
 1 | xml""
   | ^^^^^
@@ -20,6 +17,3 @@ scala> s"
 1 | s"
   |  ^
   |  unclosed string literal
-1 | s"
-  |   ^
-  |   ';' expected, but eof found