diff --git a/pdf.c b/pdf.c
index fe155c14f2fb0985436f531439af76707f0c498e..b4d72c2d2de7c9a3e2f83c0370f1111b8763a6f3 100644
--- a/pdf.c
+++ b/pdf.c
@@ -997,7 +997,7 @@ init_parser(struct Env *aux)
 				SEQ(h_many(nl), end),
 				VIOL(SEQ(h_butnot(h_ch_range(0, 255), LIT("%%EOF"))),
 				     "(offset FROM END) Data after final  %%EOF (severity=7)"))));
-	
+
 	H_RULE(xr_td,	SEQ(xrefs, KW("trailer"), ws, dict));
 
 	H_RULE(hdr_junk,    VIOL(h_many1(h_butnot(h_ch_range(0, 255), objdef)),
@@ -1717,9 +1717,9 @@ p_xrefdata__m(HAllocator *mm__, const Dict *dict)
 	 * for field 3 (generation). in fact, these are the only defaults
 	 * defined by ISO 32000-1:2008 (PDF 1.7).
 	 *
-	 *   entry type	 field no.  default value
-	 *		 1 (type)   1
-	 *   1 ("n")	 3 (gen.)   0
+	 *   entry type  field no.  default value
+	 *               1 (type)   1
+	 *   1 ("n")     3 (gen.)   0
 	 */
 
 	/* Size (required) - total size of xref table */
@@ -1762,7 +1762,7 @@ p_xrefdata__m(HAllocator *mm__, const Dict *dict)
 	 *
 	 *   [t x y] with t,x,y > 0  full general form
 	 *   [0 x y] with x,y > 0    only type-1 ("in use") entries
-	 *   [0 x 0] with x > 0	     only type-1 entries, only offsets
+	 *   [0 x 0] with x > 0      only type-1 entries, only offsets
 	 *
 	 * however, though nonsensical, [t x 0] with t,x > 0 is not disallowed
 	 * by the spec; as long as all entries are of type 1, the xref data can