Minor, break the line in "kotlinc -help" if it's too long

To improve description of the "pluginOptions" flag

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.java

@@ -52,7 +52,7 @@ public abstract class CommonCompilerArguments {
     @ValueDescription("<path>")
     public String[] pluginClasspaths;
 
-    @Argument(value = "P", description = "\n                             Pass an option to a plugin")
+    @Argument(value = "P", description = "Pass an option to a plugin")
     @ValueDescription(PLUGIN_OPTION_FORMAT)
     public String[] pluginOptions;
 

compiler/cli/src/org/jetbrains/kotlin/cli/common/Usage.java

@@ -72,9 +72,16 @@ class Usage {
             sb.append(" ");
             sb.append(description.value());
         }
-        while (sb.length() < OPTION_NAME_PADDING_WIDTH - 1) {
+
+        int width = OPTION_NAME_PADDING_WIDTH - 1;
+        if (sb.length() >= width + 5) { // Break the line if it's too long
+            sb.append("\n");
+            width += sb.length();
+        }
+        while (sb.length() < width) {
             sb.append(" ");
         }
+
         sb.append(" ");
         sb.append(argument.description());
         return sb.toString();