Add minimization of previous scalatest stripMargin issue

Author: nicolasstucki

tests/neg-macros/reflect-inline/assert_1.scala

@@ -0,0 +1,10 @@
+import scala.quoted._
+
+object api {
+  inline def (inline x: String) stripMargin2: String =
+    ${ stripImpl(x) }
+
+  private def stripImpl(x: String)(given qctx: QuoteContext): Expr[String] =
+    Expr(x.stripMargin)
+
+}

tests/neg-macros/reflect-inline/test_2.scala

@@ -0,0 +1,6 @@
+import api._
+
+class Test {
+  val a: String = "5"
+  a.stripMargin2 // error: `a should be a known constant
+}