Fixes Maruku + iframes breakage

Author: heathermiller

sips/pending/_posts/2011-10-13-string-interpolation.md

@@ -13,5 +13,5 @@ document on Google Docs](https://docs.google.com/document/d/1NdxNxZYodPA-c4MLr33
 
 <iframe 
   src="https://docs.google.com/document/d/1NdxNxZYodPA-c4MLr33KzwzKFkzm9iW9POexT9PkJsU/edit?hl=en_US"
-  style="width:720px;height:800px;"></iframe>
+  style="width:720px;height:800px;"> </iframe>
 

sips/pending/_posts/2012-01-30-value-classes.md

@@ -11,5 +11,5 @@ This SIP is an embedded google document. If you have trouble with this embedded
 
 <iframe 
   src="https://docs.google.com/document/d/10TQKgMiJTbVtkdRG53wsLYwWM2MkhtmdV25-NZvLLMA/edit?hl=en_US"
-  style="width:720px;height:800px;"></iframe>
+  style="width:720px;height:800px;"> </iframe>
 

sips/pending/_posts/2012-03-09-self-cleaning-macros.md

@@ -11,4 +11,4 @@ This SIP is an embedded google document. If you have trouble with this embedded
 
 <iframe
   src="https://docs.google.com/document/d/1O879Iz-567FzVb8kw6N5OBpei9dnbW0ZaT7-XNSa6Cs/edit?hl=en_US"
-  style="width:720px;height:800px;"></iframe>
+  style="width:720px;height:800px;"> </iframe>

sips/pending/_posts/2012-03-13-type-dynamic.md

@@ -11,4 +11,4 @@ This SIP is an embedded google document. If you have trouble with this embedded
 
 <iframe 
   src="https://docs.google.com/document/d/1XaNgZ06AR7bXJA9-jHrAiBVUwqReqG4-av6beoLaf3U/edit"
-  style="width:720px;height:800px;"></iframe>
+  style="width:720px;height:800px;"> </iframe>

sips/pending/_posts/2012-03-17-modularizing-language-features.md

@@ -13,4 +13,4 @@ To see or contribute to the discussion on this topic, please see the [thread](ht
 
 <iframe 
   src="https://docs.google.com/document/d/1nlkvpoIRkx7at1qJEZafJwthZ3GeIklTFhqmXMvTX9Q/edit"
-  style="width:720px;height:800px;"></iframe>
+  style="width:720px;height:800px;"> </iframe>