fixes the bug that keeps the template engine package from working

tests/template/annotate.nim

@@ -0,0 +1,113 @@
+import macros, parseutils
+
+# Generate tags
+macro make(names: openarray[expr]): stmt {.immediate.} =
+    result = newStmtList()
+
+    for i in 0 .. names.len-1:
+        result.add newProc(
+            name   = ident($names[i]).postfix("*"),
+            params = [
+                ident("string"),
+                newIdentDefs(
+                    ident("content"),
+                    ident("string")
+                )
+            ],
+            body = newStmtList(
+                parseStmt("reindent(content)")
+            )
+        )
+
+
+iterator lines(value: string): string =
+    var i = 0
+    while i < value.len:
+        var line: string
+        inc(i, value.parseUntil(line, 0x0A.char, i) + 1)
+        yield line
+
+
+proc reindent*(value: string, preset_indent = 0): string =
+    var indent = -1
+
+    # Detect indentation!
+    for ln in lines(value):
+        var read = ln.skipWhitespace()
+
+        # If the line is empty, ignore it for indentation
+        if read == ln.len: continue
+
+        indent = if indent < 0: read
+                 else: min(indent, read)
+
+    # Create a precursor indent as-needed
+    var precursor = newString(0)
+    for i in 1 .. preset_indent:
+        precursor.add(' ')
+
+    # Re-indent
+    result = newString(0)
+
+    for ln in lines(value):
+        var value = ln.substr(indent)
+
+        result.add(precursor)
+
+        if value.len > 0:
+            result.add(value)
+            result.add(0x0A.char)
+
+    return result
+
+
+#Define tags
+make([ html, xml, glsl, js, css, rst ])
+
+
+when isMainModule:
+    ## Test tags
+
+    const script = js"""
+        var x = 5;
+        console.log(x.toString());
+    """
+
+    const styles = css"""
+        .someRule {
+            width: 500px;
+        }
+    """
+
+    const body = html"""
+        <ul>
+            <li>1</li>
+            <li>2</li>
+            <li>
+                <a hef="#google">google</a>
+            </li>
+        </ul>
+    """
+
+    const info = xml"""
+        <item>
+            <i>1</i>
+            <i>2</i>
+        </item>
+    """
+
+    const shader = glsl"""
+        void main()
+        {
+            gl_Position = gl_ProjectionMatrix
+                        * gl_ModelViewMatrix
+                        * gl_Vertex;
+        }
+    """
+
+
+    echo script
+    echo styles
+    echo body
+    echo info
+    echo shader