Fix API docs typos (#1641)

Author: andreyaksenov

core/commonMain/src/kotlinx/serialization/SerialFormat.kt

@@ -55,7 +55,7 @@ public interface BinaryFormat : SerialFormat {
     public fun <T> encodeToByteArray(serializer: SerializationStrategy<T>, value: T): ByteArray
 
     /**
-     * Decodes and deserializes the given [byte array][bytes] to to the value of type [T] using the given [deserializer]
+     * Decodes and deserializes the given [byte array][bytes] to the value of type [T] using the given [deserializer]
      */
     public fun <T> decodeFromByteArray(deserializer: DeserializationStrategy<T>, bytes: ByteArray): T
 }
@@ -79,7 +79,7 @@ public interface StringFormat : SerialFormat {
     public fun <T> encodeToString(serializer: SerializationStrategy<T>, value: T): String
 
     /**
-     * Decodes and deserializes the given [string] to to the value of type [T] using the given [deserializer]
+     * Decodes and deserializes the given [string] to the value of type [T] using the given [deserializer]
      */
     public fun <T> decodeFromString(deserializer: DeserializationStrategy<T>, string: String): T
 }
@@ -92,7 +92,7 @@ public inline fun <reified T> StringFormat.encodeToString(value: T): String =
     encodeToString(serializersModule.serializer(), value)
 
 /**
- * Decodes and deserializes the given [string] to to the value of type [T] using deserializer
+ * Decodes and deserializes the given [string] to the value of type [T] using deserializer
  * retrieved from the reified type parameter.
  */
 @OptIn(ExperimentalSerializationApi::class)
@@ -153,7 +153,7 @@ public inline fun <reified T> BinaryFormat.encodeToByteArray(value: T): ByteArra
     encodeToByteArray(serializersModule.serializer(), value)
 
 /**
- * Decodes and deserializes the given [byte array][bytes] to to the value of type [T] using deserializer
+ * Decodes and deserializes the given [byte array][bytes] to the value of type [T] using deserializer
  * retrieved from the reified type parameter.
  */
 @OptIn(ExperimentalSerializationApi::class)

formats/json/jvmMain/src/kotlinx/serialization/json/internal/JsonStringBuilder.kt

@@ -8,7 +8,7 @@ package kotlinx.serialization.json.internal
  * In order to encode a single string, it should be processed symbol-per-symbol,
  * in order to detect and escape unicode symbols.
  *
- * Doing naively, it drastically slows down strings processing due to to factors:
+ * Doing naively, it drastically slows down strings processing due to factors:
  * * Byte-by-byte copying that does not leverage optimized array copying
  * * A lot of range and flags checks due to Java's compact strings
  *