Add del alias for rm helper command

app/src/main/java/solutions/tretter/githugandroid/GitRuntime.kt

@@ -84,7 +84,7 @@ class GitRepositoryRuntime(private val context: Context) {
             add("Native Git prototype:")
             add("  binary path: nativeLibraryDir/libgit.so")
             add("  selected ABI: ${Build.SUPPORTED_ABIS.firstOrNull() ?: "unknown"}")
-            add("  helper commands: ls/dir, pwd, cat, touch, mkdir/md, cd.., rm, echo")
+            add("  helper commands: ls/dir, pwd, cat, touch, mkdir/md, cd.., rm/del, echo")
             add("  visual editors: vi, nano, emacs, ed, ex")
             add("  git help <command>")
         }
@@ -240,13 +240,13 @@ class GitRepositoryRuntime(private val context: Context) {
                     }
                 }
             }
-            "rm" -> {
+            "rm", "del" -> {
                 val targets = tokens.drop(1)
                 if (targets.isEmpty()) return currentRepo to listOf("usage: rm <path>")
                 val errors = targets.mapNotNull { target ->
                     val file = File(workingDir, target)
                     if (!file.exists()) {
-                        "rm: $target: No such file or directory"
+                        "${tokens.first()}: $target: No such file or directory"
                     } else {
                         file.deleteRecursively()
                         null