Improve bare string exceptions

This prints the bare string that caused the exception, which is useful for debugging from logs, and removes the extra and less useful "Not a statement" exception in these cases.

src/main/java/com/laytonsmith/core/MethodScriptCompiler.java

@@ -1944,11 +1944,12 @@ private static void checkLinearComponents(ParseTree tree, Environment env,
 		for(ParseTree m : tree.getAllNodes()) {
 			if(m.getData() instanceof CBareString && !(m.getData() instanceof CKeyword)) {
 				if(m.getFileOptions().isStrict()) {
-					compilerErrors.add(new ConfigCompileException("Use of bare strings in strict mode is not"
-							+ " allowed.", m.getTarget()));
+					compilerErrors.add(new ConfigCompileException("Use of bare (unquoted) string: "
+							+ m.getData().val(), m.getTarget()));
 				} else {
 					env.getEnv(CompilerEnvironment.class).addCompilerWarning(m.getFileOptions(),
-							new CompilerWarning("Use of bare string", m.getTarget(),
+							new CompilerWarning("Use of bare (unquoted) string: "
+									+ m.getData().val(), m.getTarget(),
 									FileOptions.SuppressWarning.UseBareStrings));
 					return; // for now, only one warning per file
 				}

src/main/java/com/laytonsmith/core/functions/Compiler.java

@@ -11,10 +11,12 @@
 import com.laytonsmith.core.ParseTree;
 import com.laytonsmith.core.Script;
 import com.laytonsmith.core.compiler.FileOptions;
+import com.laytonsmith.core.constructs.CBareString;
 import com.laytonsmith.core.constructs.CBracket;
 import com.laytonsmith.core.constructs.CClassType;
 import com.laytonsmith.core.constructs.CEntry;
 import com.laytonsmith.core.constructs.CFunction;
+import com.laytonsmith.core.constructs.CKeyword;
 import com.laytonsmith.core.constructs.CLabel;
 import com.laytonsmith.core.constructs.CNull;
 import com.laytonsmith.core.constructs.CString;
@@ -698,7 +700,10 @@ public boolean preResolveVariables() {
 		public ParseTree postParseRewrite(ParseTree ast, Environment env,
 				Set<Class<? extends Environment.EnvironmentImpl>> envs, Set<ConfigCompileException> exceptions) {
 			for(ParseTree child : ast.getChildren()) {
-				if(!(child.getData() instanceof CFunction)) {
+				// We only expect functions here.
+				// Bare strings already have a better exception from MethodScriptCompiler.checkLinearComponents()
+				if(!(child.getData() instanceof CFunction)
+						&& (!(child.getData() instanceof CBareString) || child.getData() instanceof CKeyword)) {
 					exceptions.add(new ConfigCompileException("Not a statement.", child.getTarget()));
 				}
 			}