bugfix: immediate templates are preferred consistently (danger: breaks code)

tests/template/tprefer_immediate.nim

@@ -0,0 +1,17 @@
+discard """
+  output: '''immediate'''
+"""
+
+# Test that immediate templates are preferred over non-immediate templates
+
+template foo(a, b: expr) = echo "foo expr"
+
+template foo(a, b: int) = echo "foo int"
+template foo(a, b: float) = echo "foo float"
+template foo(a, b: string) = echo "foo string"
+template foo(a, b: expr) {.immediate.} = echo "immediate"
+template foo(a, b: bool) = echo "foo bool"
+template foo(a, b: char) = echo "foo char"
+
+foo(undeclaredIdentifier, undeclaredIdentifier2)
+