Allowing access to globals while in a loop

This used to make a name like DATA.0.STR.  Since bash doesn't like using
multi-dimensional arrays, we can shortcut things and just assume that
STR referes to the global variable here.

This closes issue #7

mo

@@ -111,7 +111,7 @@ mustache-find-string() {
 #     $2: Context name
 #     $3: Desired variable name
 mustache-full-tag-name() {
-    if [[ -z "$2" ]]; then
+    if [[ -z "$2" ]] || [[ "$2" == *.* ]]; then
         local "$1" && mustache-indirect "$1" "$3"
     else
         local "$1" && mustache-indirect "$1" "${2}.${3}"

tests/globals-in-loop.env

@@ -0,0 +1,2 @@
+STR=abc
+DATA=(111 222)

tests/globals-in-loop.expected

@@ -0,0 +1,6 @@
+Issue #7
+abc
+    Item: 111
+    String: abc
+    Item: 222
+    String: abc

tests/globals-in-loop.template

@@ -0,0 +1,6 @@
+Issue #7
+{{STR}}
+{{#DATA}}
+    Item: {{.}}
+    String: {{STR}}
+{{/DATA}}