Update runtime files.
diff --git a/runtime/doc/if_mzsch.txt b/runtime/doc/if_mzsch.txt
index 7b7e6b1..c6888a8 100644
--- a/runtime/doc/if_mzsch.txt
+++ b/runtime/doc/if_mzsch.txt
@@ -1,4 +1,4 @@
-*if_mzsch.txt* For Vim version 8.1. Last change: 2019 May 05
+*if_mzsch.txt* For Vim version 8.1. Last change: 2019 Jul 21
VIM REFERENCE MANUAL by Sergey Khorev
@@ -39,7 +39,7 @@
:[range]mz[scheme] {stmt}
Execute MzScheme statement {stmt}.
-:[range]mz[scheme] << {endmarker}
+:[range]mz[scheme] << [endmarker]
{script}
{endmarker}
Execute inlined MzScheme script {script}.
@@ -47,6 +47,13 @@
feature wasn't compiled in. To avoid errors, see
|script-here|.
+ The {endmarker} below the {script} must NOT be
+ preceded by any white space.
+
+ If [endmarker] is omitted from after the "<<", a dot
+ '.' must be used after {script}, like for the
+ |:append| and |:insert| commands.
+
*:mzfile* *:mzf*
:[range]mzf[ile] {file} Execute the MzScheme script in {file}.