[commit: ghc] master: Fix documentation for setByteArray# (082936d)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/082936d98a619e8f7a95c7762fb40fae04c99db5/ghc

>---------------------------------------------------------------

commit 082936d98a619e8f7a95c7762fb40fae04c99db5
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Wed Feb 8 18:55:32 2017 -0500

    Fix documentation for setByteArray#
    
    The documentation was previously unusably incomplete.


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082936d98a619e8f7a95c7762fb40fae04c99db5
 compiler/prelude/primops.txt.pp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compiler/prelude/primops.txt.pp b/compiler/prelude/primops.txt.pp
index 533d198..f1ee3b3 100644
--- a/compiler/prelude/primops.txt.pp
+++ b/compiler/prelude/primops.txt.pp
@@ -1440,7 +1440,8 @@ primop  CopyAddrToByteArrayOp "copyAddrToByteArray#" GenPrimOp
 
 primop  SetByteArrayOp "setByteArray#" GenPrimOp
   MutableByteArray# s -> Int# -> Int# -> Int# -> State# s -> State# s
-  {Set the range of the MutableByteArray# to the specified character.}
+  {{\tt setByteArray# ba off len c} sets the byte range {\tt [off, off+len]} of
+   the {\tt MutableByteArray#} to the byte {\tt c}.}
   with
   has_side_effects = True
   code_size = { primOpCodeSizeForeignCall + 4 }