Improvements to the documentation for sqlite3_backup. No code changes.

FossilOrigin-Name: f83609f4703b5e74a91bca071a4ac2843189f463

manifest

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-C Fix\san\sassertion\sfault\sthat\scan\sonly\soccur\sif\sSQLITE_ENABLE_STAT2\sis\sdefined\nand\sthe\sconstant\sfolding\soptimization\sis\sdisabled\susing\ssqlite3_test_control().\nProblem\sintroduced\sby\s[ad8bc68197f2b4]\sbut\swe\smissed\sit\sprior\sto\sthe\s3.7.4\nrelease\sdue\sto\staking\sshortcuts\sand\sskipping\stests\sin\sthe\srelease\schecklist.
+C Improvements\sto\sthe\sdocumentation\sfor\ssqlite3_backup.\s\sNo\scode\schanges.
-D 2010-12-16T19:52:53
+D 2010-12-16T20:35:09
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 F Makefile.in 4547616ad2286053af6ccccefa242dc925e49bf0
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 F src/rowset.c 69afa95a97c524ba6faf3805e717b5b7ae85a697
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-F src/sqlite.h.in eac5fdf313cd314b23093d70bf09b070e8f67919
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 F src/sqliteLimit.h a17dcd3fb775d63b64a43a55c54cb282f9726f44
@@ -897,14 +897,14 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
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manifest.uuid

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-70a3d81742fcd481f83ccc8f7ff6af58bc29c4fa
+f83609f4703b5e74a91bca071a4ac2843189f463

src/sqlite.h.in

@@ -5783,11 +5783,12 @@ typedef struct sqlite3_backup sqlite3_backup;
 **
 ** See Also: [Using the SQLite Online Backup API]
 **
-** ^Exclusive access is required to the destination database for the 
+** ^SQLite holds a write transaction open on the destination database file
-** duration of the operation. ^However the source database is only
+** for the duration of the backup operation.
-** read-locked while it is actually being read; it is not locked
+** ^The source database is read-locked only while it is being read;
-** continuously for the entire backup operation. ^Thus, the backup may be
+** it is not locked continuously for the entire backup operation.
-** performed on a live source database without preventing other users from
+** ^Thus, the backup may be performed on a live source database without
+** preventing other database connections from
 ** reading or writing to the source database while the backup is underway.
 ** 
 ** ^(To perform a backup operation: 
@@ -5835,7 +5836,7 @@ typedef struct sqlite3_backup sqlite3_backup;
 ** the source and destination databases specified by [sqlite3_backup] object B.
 ** ^If N is negative, all remaining source pages are copied. 
 ** ^If sqlite3_backup_step(B,N) successfully copies N pages and there
-** are still more pages to be copied, then the function resturns [SQLITE_OK].
+** are still more pages to be copied, then the function returns [SQLITE_OK].
 ** ^If sqlite3_backup_step(B,N) successfully finishes copying all pages
 ** from source to destination, then it returns [SQLITE_DONE].
 ** ^If an error occurs while running sqlite3_backup_step(B,N),