Minor refactoring in SimpleCommentBuildr and CustomJavaDocCommentBuilder (#788)

* Minor refactoring in SimpleCommentBuildr and CustomJavaDocCommentBuilder

* Minor review fix

Author: onewhl

utbot-summary/src/main/kotlin/org/utbot/summary/comment/CustomJavaDocCommentBuilder.kt

@@ -45,16 +45,11 @@ class CustomJavaDocCommentBuilder(
 
         // builds Throws exception section
         val thrownException = traceTag.result.exceptionOrNull()
-        val exceptionThrow: String? = if (thrownException == null) {
-            traceTag.result.exceptionOrNull()?.let { it::class.qualifiedName }
-        } else {
+        if (thrownException != null) {
             val exceptionName = thrownException.javaClass.name
             val reason = findExceptionReason(currentMethod, thrownException)
-            "{@link $exceptionName} $reason"
-        }
 
-        if (exceptionThrow != null) {
-            customJavaDocComment.throwsException = exceptionThrow
+            customJavaDocComment.throwsException = "{@link $exceptionName} $reason"
         }
 
         // builds Iterates section

utbot-summary/src/main/kotlin/org/utbot/summary/comment/SimpleCommentBuilder.kt

@@ -57,12 +57,9 @@ open class SimpleCommentBuilder(
         root: SimpleSentenceBlock,
         currentMethod: SootMethod
     ) {
-        val thrownException = traceTag.result.exceptionOrNull()
-        if (thrownException == null) {
-            root.exceptionThrow = traceTag.result.exceptionOrNull()?.let { it::class.qualifiedName }
-        } else {
-            val exceptionName = thrownException.javaClass.simpleName
-            val reason = findExceptionReason(currentMethod, thrownException)
+        traceTag.result.exceptionOrNull()?.let {
+            val exceptionName = it.javaClass.simpleName
+            val reason = findExceptionReason(currentMethod, it)
             root.exceptionThrow = "$exceptionName $reason"
         }
     }