Merge pull request #208 from stokado/fix/KTOR-7932

* Fix ArrayIndexOutOfBounds exception
* Update README to clarify tool usage

---------

Co-authored-by: Osip Fatkullin <osip.fatkullin@gmail.com>

Author: osipxd

version-diff/README.md

@@ -7,5 +7,12 @@ A diff tool for maven artifacts written using the [Ktor](https://ktor.io) client
 Execute this command in a sample directory:
 
 ```bash
-./gradlew run --args="1.6.8 2.2.2 <Optional repo url, default https://repo.maven.apache.org/maven2/io/ktor>"
+./gradlew run --args="1.6.8 2.2.2"
 ```
+
+* `1.6.8` and `2.2.2` are the versions of the Maven artifact to compare.
+* By default, the repository URL is https://repo.maven.apache.org/maven2/io/ktor.
+  If you want to use a repository other than the default, provide it explicitly as the third argument:
+```bash
+./gradlew run --args="2.3.13 3.0.0 https://oss.sonatype.org/content/repositories/releases/io/ktor"
+```

version-diff/src/main/kotlin/Main.kt

@@ -18,7 +18,7 @@ fun main(args: Array<String>) = runBlocking {
     val firstVersion = args[0]
     val secondVersion = args[1]
 
-    val repo = if (args.size > 2) args[3] else DEFAULT_REPO
+    val repo = if (args.size > 2) args[2] else DEFAULT_REPO
 
     println("Fetching diff for $repo $firstVersion -> $secondVersion")