Delete unused variable reference

Makefile

@@ -26,7 +26,7 @@ self ::= $(lastword ${MAKEFILE_LIST})
 # Define the Makefiles
 env_make ::= environment.mk
 curate_make ::= curate.mk
-index ::= index.mk
+index_make ::= index.mk
 
 # load environment variables
 include ${env_make}
@@ -103,7 +103,6 @@ show: #> Display key variables
 	@echo "\tCurated content directories:"
 	@echo "\t\t${curate}"
 	@echo
-	@echo ${curate_quoted}
 	@echo "\tDynamically indexed content directories:"
 	@echo "\t\t${index}"
 	@echo

environment.mk

@@ -38,7 +38,7 @@ export SHELL
 
 # User-defined configuration file
 SITE_ENV ?= content/site-env
-SITE_ENV ::= $(strip ${site_env})
+SITE_ENV ::= $(strip ${SITE_ENV})
 
 ifeq ($(strip $(shell [ -r ${SITE_ENV} ] && echo ${SITE_ENV})),)
   $(info Generate a site configuration file first via `make configure`)
@@ -99,7 +99,7 @@ show: #> Show key variables
 	@echo "Key variables defined in ${self}:"
 	@echo
 	@echo "\tBase/root directory of the build system..... ${MAKO_DIR}"
-	@echo "\tUsef-defined configuration.................. ${site_env}"
+	@echo "\tUsef-defined configuration.................. ${SITE_ENV}"
 	@echo
 	# future location for templates
 	@echo "\tLocation of user content.................... ${CONTENT}"