pgindent run for release 9.3

This is the first run of the Perl-based pgindent script.  Also update
pgindent instructions.

src/backend/access/gist/gistbuild.c

@@ -610,9 +610,9 @@ gistProcessItup(GISTBuildState *buildstate, IndexTuple itup,
 		newtup = gistgetadjusted(indexrel, idxtuple, itup, giststate);
 		if (newtup)
 		{
-			blkno  = gistbufferinginserttuples(buildstate, buffer, level,
-											   &newtup, 1, childoffnum,
-									  InvalidBlockNumber, InvalidOffsetNumber);
+			blkno = gistbufferinginserttuples(buildstate, buffer, level,
+											  &newtup, 1, childoffnum,
+									InvalidBlockNumber, InvalidOffsetNumber);
 			/* gistbufferinginserttuples() released the buffer */
 		}
 		else
@@ -680,7 +680,7 @@ gistbufferinginserttuples(GISTBuildState *buildstate, Buffer buffer, int level,
 	GISTBuildBuffers *gfbb = buildstate->gfbb;
 	List	   *splitinfo;
 	bool		is_split;
-	BlockNumber	placed_to_blk = InvalidBlockNumber;
+	BlockNumber placed_to_blk = InvalidBlockNumber;
 
 	is_split = gistplacetopage(buildstate->indexrel,
 							   buildstate->freespace,

src/backend/access/gist/gistget.c

@@ -364,8 +364,9 @@ gistScanPage(IndexScanDesc scan, GISTSearchItem *pageItem, double *myDistances,
 				item->blkno = ItemPointerGetBlockNumber(&it->t_tid);
 
 				/*
-				 * LSN of current page is lsn of parent page for child. We only
-				 * have a shared lock, so we need to get the LSN atomically.
+				 * LSN of current page is lsn of parent page for child. We
+				 * only have a shared lock, so we need to get the LSN
+				 * atomically.
 				 */
 				item->data.parentlsn = BufferGetLSNAtomic(buffer);
 			}

src/backend/access/gist/gistutil.c

@@ -414,7 +414,7 @@ gistchoose(Relation r, Page p, IndexTuple it,	/* it has compressed entry */
 	 * some inserts to go to other equally-good subtrees.
 	 *
 	 * keep_current_best is -1 if we haven't yet had to make a random choice
-	 * whether to keep the current best tuple.  If we have done so, and
+	 * whether to keep the current best tuple.	If we have done so, and
 	 * decided to keep it, keep_current_best is 1; if we've decided to
 	 * replace, keep_current_best is 0.  (This state will be reset to -1 as
 	 * soon as we've made the replacement, but sometimes we make the choice in
@@ -810,8 +810,8 @@ gistGetFakeLSN(Relation rel)
 	if (rel->rd_rel->relpersistence == RELPERSISTENCE_TEMP)
 	{
 		/*
-		 * Temporary relations are only accessible in our session, so a
-		 * simple backend-local counter will do.
+		 * Temporary relations are only accessible in our session, so a simple
+		 * backend-local counter will do.
 		 */
 		return counter++;
 	}

src/backend/access/gist/gistxlog.c

@@ -38,7 +38,7 @@ static MemoryContext opCtx;		/* working memory for operations */
  * follow-right flag, because that change is not included in the full-page
  * image.  To be sure that the intermediate state with the wrong flag value is
  * not visible to concurrent Hot Standby queries, this function handles
- * restoring the full-page image as well as updating the flag.  (Note that
+ * restoring the full-page image as well as updating the flag.	(Note that
  * we never need to do anything else to the child page in the current WAL
  * action.)
  */
@@ -89,7 +89,7 @@ gistRedoPageUpdateRecord(XLogRecPtr lsn, XLogRecord *record)
 
 	/*
 	 * We need to acquire and hold lock on target page while updating the left
-	 * child page.  If we have a full-page image of target page, getting the
+	 * child page.	If we have a full-page image of target page, getting the
 	 * lock is a side-effect of restoring that image.  Note that even if the
 	 * target page no longer exists, we'll still attempt to replay the change
 	 * on the child page.