upgrade dependencies

improve gitignore for gradle

enable Scala 2.13.16

override showFormatted to use format with break

Author: tribbloid

.gitignore

@@ -49,9 +49,11 @@ project/plugins/project/
 # the Singapore stack
 **/.ammonite/
 
+# Compiler
 # Compiler
 output
-*/target/
+**/out
+**/target/
 
 #Misc
 temp

build.gradle.kts

@@ -142,7 +142,7 @@ allprojects {
 
         val scalaTestV = "3.2.11"
         testFixturesApi("org.scalatest:scalatest_${vs.scalaBinaryV}:${scalaTestV}")
-        testImplementation("org.junit.jupiter:junit-jupiter:5.11.2")
+        testImplementation("org.junit.jupiter:junit-jupiter:5.11.4")
 
         testRuntimeOnly("co.helmethair:scalatest-junit-runner:0.2.0")
     }

core/src/main/scala-2.13.7+/latest/splain/SplainFormattingExtension.scala

@@ -899,4 +899,6 @@ trait SplainFormattingExtension extends typechecker.splain.SplainFormatting with
   override def showFormattedLImpl(ft: Formatted, break: Boolean): TypeRepr = {
     ShowFormattedHelper(break)(ft)
   }
+
+  override def showFormatted(tpe: Formatted): String                    = showFormattedL(tpe, break = true).joinLines
 }