Do not render default value for var properties

plugins/base/src/main/kotlin/signatures/KotlinSignatureProvider.kt

@@ -275,10 +275,15 @@ class KotlinSignatureProvider(ctcc: CommentsToContentConverter, logger: DokkaLog
                 link(p.name, p.dri, styles = mainStyles + p.stylesIfDeprecated(sourceSet))
                 operator(": ")
                 signatureForProjection(p.type)
-                defaultValueAssign(p, sourceSet)
+
+                if (p.isNotMutable()) {
+                    defaultValueAssign(p, sourceSet)
+                }
             }
         }
 
+    private fun DProperty.isNotMutable(): Boolean = !isMutable()
+
     private fun DProperty.isMutable(): Boolean {
         return this.extra[IsVar] != null || this.setter != null
     }

plugins/base/src/test/kotlin/content/signatures/ContentForSignaturesTest.kt

@@ -373,7 +373,35 @@ class ContentForSignaturesTest : BaseAbstractTest() {
             pagesTransformationStage = { module ->
                 val page = module.children.single { it.name == "test" } as PackagePageNode
                 page.content.assertNode {
-                    propertySignature(emptyMap(), "protected", "", setOf("lateinit"), "var", "property", "Int", "6")
+                    propertySignature(emptyMap(), "protected", "", setOf("lateinit"), "var", "property", "Int", null)
+                }
+            }
+        }
+    }
+
+    @Test
+    fun `should not display default value for mutable property`() {
+        testInline(
+            """
+            |/src/main/kotlin/test/source.kt
+            |package test
+            |
+            |var property: Int = 6
+        """.trimIndent(), testConfiguration
+        ) {
+            pagesTransformationStage = { module ->
+                val page = module.children.single { it.name == "test" } as PackagePageNode
+                page.content.assertNode {
+                    propertySignature(
+                        annotations = emptyMap(),
+                        visibility = "",
+                        modifier = "",
+                        keywords = setOf(),
+                        preposition = "var",
+                        name = "property",
+                        type = "Int",
+                        value = null
+                    )
                 }
             }
         }

plugins/base/src/test/kotlin/utils/contentUtils.kt

@@ -176,7 +176,7 @@ fun ContentMatcherBuilder<*>.propertySignature(
                                     }
                                 }
                             }
-                            if (type != null) {
+                            if (value != null) {
                                 +(" = $value")
                             }
                         }