re-enable ignored ktlint rules and update .editorconfig

fixes #429

.editorconfig

@@ -9,7 +9,7 @@
 #
 # Some keys were manually changed:
 #   * insert_final_newline (is false, changed to true, expected by KtLint)
-#   * kotlin_imports_layout (see comment below, needed for KtLint)
+#   * ktlint_ignore_back_ticked_identifier (enabled, see comment below)
 #   * root (see comment below)
 
 # Tells tools to stop searching upwards.
@@ -30,10 +30,9 @@ ij_formatter_tags_enabled = false
 ij_smart_tabs = false
 ij_wrap_on_typing = false
 
-# This config is needed for KtLint. It configures the import rule order to use IntelliJ IDEA's
-# default style, see also:
-# https://github.com/pinterest/ktlint#custom-ktlint-specific-editorconfig-properties
-kotlin_imports_layout = *,java.**,javax.**,kotlin.**,^
+# Back-ticked method names are allowed to exceed the line length. That's especially helpful for
+# test methods with descriptive names.
+ktlint_ignore_back_ticked_identifier = true
 
 [*.java]
 ij_java_align_consecutive_assignments = false

build.gradle.kts

@@ -65,28 +65,6 @@ subprojects {
       // Default "plain" reporter is actually harder to read.
       reporter(ReporterType.JSON)
     }
-
-    disabledRules.set(
-      setOf(
-        // IntelliJ refuses to sort imports correctly.
-        // This is a known issue: https://github.com/pinterest/ktlint/issues/527
-        "import-ordering",
-
-        // We had to disable the indent and parameter-list-wrapping rules, because they lead to
-        // false positives even in the most recent KtLint version. We created tickets:
-        //
-        // https://github.com/pinterest/ktlint/issues/963
-        // https://github.com/pinterest/ktlint/issues/964
-        // https://github.com/pinterest/ktlint/issues/965
-        //
-        // We can't revert the KtLint version, because they only work with Kotlin 1.3 and would
-        // block Kotlin 1.4. We rather have a newer Kotlin version than a proper indent. The
-        // indent rule needs to be disabled globally due to another bug:
-        // https://github.com/pinterest/ktlint/issues/967
-        "indent",
-        "parameter-list-wrapping"
-      )
-    )
   }
 }