gdb/doc: reword description of DisassembleInfo.read_memory
While reading the documentation of DisassembleInfo.read_memory I
spotted the word 'available' in one sentence where it didn't make
sense.
diff --git a/gdb/doc/python.texi b/gdb/doc/python.texi
index f73b9a4..e7adeac 100644
--- a/gdb/doc/python.texi
+++ b/gdb/doc/python.texi
@@ -6812,7 +6812,7 @@
not itself raise a @code{MemoryError}.
Any other exception type raised in @code{read_memory} will propagate
-back and be available re-raised by @code{builtin_disassemble}.
+back and be re-raised by @code{builtin_disassemble}.
@end defun
@end deftp
