- separated unsigned primitive tests

- fixed #issue13

Author: elect86

.idea/libraries/Gradle__junit_junit_4_12.xml

@@ -23,7 +23,7 @@ dependencies {
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
 
-    testImplementation'io.kotlintest:kotlintest-runner-junit5:3.0.6'
+    testImplementation'io.kotlintest:kotlintest-runner-junit5:3.1.0'
 }
 
 repositories {

.idea/libraries/Gradle__org_hamcrest_hamcrest_core_1_3.xml

@@ -186,7 +186,7 @@ internal fun Long.formatUnsignedLong(shift: Int, buf: CharArray, offset: Int, le
     val radix = 1 shl shift
     val mask = radix - 1
     do {
-        buf[offset + --charPos] = digits[toInt() and mask]
+        buf[offset + --charPos] = digits[_this.toInt() and mask]
         _this = _this ushr shift
     } while (_this != 0L && charPos > 0)