Use escape_literal more places

Author: ankane

lib/pgslice/cli/prep.rb

@@ -55,7 +55,7 @@ def prep(table, column = nil, period = nil)
         # add comment
         cast = table.column_cast(column)
         queries << <<~SQL
-          COMMENT ON TABLE #{quote_table(intermediate_table)} IS 'column:#{column},period:#{period},cast:#{cast},version:#{version}';
+          COMMENT ON TABLE #{quote_table(intermediate_table)} IS #{escape_literal("column:#{column},period:#{period},cast:#{cast},version:#{version}")};
         SQL
       else
         queries << <<~SQL
@@ -85,7 +85,7 @@ def prep(table, column = nil, period = nil)
 
         cast = table.column_cast(column)
         queries << <<~SQL
-          COMMENT ON TRIGGER #{quote_ident(trigger_name)} ON #{quote_table(intermediate_table)} IS 'column:#{column},period:#{period},cast:#{cast}';
+          COMMENT ON TRIGGER #{quote_ident(trigger_name)} ON #{quote_table(intermediate_table)} IS #{escape_literal("column:#{column},period:#{period},cast:#{cast}")};
         SQL
       end