Fix repo rules environment variables list (#204)

Add a newline before repo rules list of environment variable dependencies so that the list correctly renders.
diff --git a/stardoc/templates/html_tables/repository_rule.vm b/stardoc/templates/html_tables/repository_rule.vm
index 6594130..2378562 100644
--- a/stardoc/templates/html_tables/repository_rule.vm
+++ b/stardoc/templates/html_tables/repository_rule.vm
@@ -44,6 +44,7 @@
 **ENVIRONMENT VARIABLES**
 
 This repository rule depends on the following environment variables:
+
 #foreach ($var in $ruleInfo.getEnvironList())
 * ${util.markdownCodeSpan($var)}
 #end
diff --git a/stardoc/templates/markdown_tables/repository_rule.vm b/stardoc/templates/markdown_tables/repository_rule.vm
index ed4a2a9..4473f01 100644
--- a/stardoc/templates/markdown_tables/repository_rule.vm
+++ b/stardoc/templates/markdown_tables/repository_rule.vm
@@ -25,6 +25,7 @@
 **ENVIRONMENT VARIABLES**
 
 This repository rule depends on the following environment variables:
+
 #foreach ($var in $ruleInfo.getEnvironList())
 * ${util.markdownCodeSpan($var)}
 #end
diff --git a/test/testdata/repo_rules_test/golden.md b/test/testdata/repo_rules_test/golden.md
index de907c7..ac43415 100644
--- a/test/testdata/repo_rules_test/golden.md
+++ b/test/testdata/repo_rules_test/golden.md
@@ -24,6 +24,7 @@
 **ENVIRONMENT VARIABLES**
 
 This repository rule depends on the following environment variables:
+
 * `FOO_CC`
 * `BAR_PATH`