Use expression bodies instead of return statements

src/commonMain/kotlin/io/github/alexandrepiveteau/graphs/util/Packing.kt

@@ -2,18 +2,13 @@ package io.github.alexandrepiveteau.graphs.util
 
 /** Packs two [Int] values into one [Long] value for use in inline classes. */
 @PublishedApi
-internal inline fun packInts(val1: Int, val2: Int): Long {
-  return val1.toLong().shl(32) or (val2.toLong() and 0xFFFFFFFF)
-}
+internal inline fun packInts(
+    val1: Int,
+    val2: Int,
+): Long = val1.toLong().shl(32) or (val2.toLong() and 0xFFFFFFFF)
 
 /** Unpacks the first [Int] value in [packInts] from its returned [Long]. */
-@PublishedApi
-internal inline fun unpackInt1(value: Long): Int {
-  return value.shr(32).toInt()
-}
+@PublishedApi internal inline fun unpackInt1(value: Long): Int = value.shr(32).toInt()
 
 /** Unpacks the second [Int] value in [packInts] from its returned [Long]. */
-@PublishedApi
-internal inline fun unpackInt2(value: Long): Int {
-  return value.and(0xFFFFFFFF).toInt()
-}
+@PublishedApi internal inline fun unpackInt2(value: Long): Int = value.and(0xFFFFFFFF).toInt()