Fix spelling, grammar, and formatting issues.

Change-Id: Ie433486c36a75699e55427fa8be496f7bfbf7f1d
diff --git a/lib/ExecutionEngine/Script.cpp b/lib/ExecutionEngine/Script.cpp
index ac231b4..4b0b406 100644
--- a/lib/ExecutionEngine/Script.cpp
+++ b/lib/ExecutionEngine/Script.cpp
@@ -401,7 +401,7 @@
 }
 
 int Script::writeCache() {
-  // Not compiled script or encouter error during the compilation.
+  // Not compiled script or encountered error during the compilation.
   if ((mStatus != ScriptStatus::Compiled) ||
       (getCompilerErrorMessage() == NULL))
     return 1;