Updated runtime files.
diff --git a/runtime/doc/channel.txt b/runtime/doc/channel.txt
index 7d684fb..cc4bc90 100644
--- a/runtime/doc/channel.txt
+++ b/runtime/doc/channel.txt
@@ -1,4 +1,4 @@
-*channel.txt* For Vim version 7.4. Last change: 2016 Mar 26
+*channel.txt* For Vim version 7.4. Last change: 2016 Mar 28
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -616,6 +616,9 @@
"err_name": "/path/file" the name of the file or buffer to write to
"err_buf": number the number of the buffer to write to
+"block_write": number only for testing: pretend every other write to stdin
+ will block
+
Writing to a buffer ~