hush: fix improper handling of newline and hash chars in few corner cases

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/shell/hush_test/hush-parsing/comment1.tests b/shell/hush_test/hush-parsing/comment1.tests
new file mode 100755
index 0000000..d268860
--- /dev/null
+++ b/shell/hush_test/hush-parsing/comment1.tests
@@ -0,0 +1,2 @@
+echo Nothing: #should-not-be-echoed
+echo String: ""#should-be-echoed