patch 8.1.1694: the RUN_VIM variable is longer than needed

Problem:    The RUN_VIM variable is longer than needed.
Solution:   Shorten RUN_VIM. (Daniel Hahler, closes #4643)
diff --git a/src/testdir/Makefile b/src/testdir/Makefile
index 470f41e..0efebb5 100644
--- a/src/testdir/Makefile
+++ b/src/testdir/Makefile
@@ -81,7 +81,7 @@
 
 RM_ON_RUN = test.out X* viminfo
 RM_ON_START = tiny.vim small.vim mbyte.vim mzscheme.vim test.ok benchmark.out
-RUN_VIM = VIMRUNTIME=$(SCRIPTSOURCE); export VIMRUNTIME; $(VALGRIND) $(VIMPROG) -f $(GUI_FLAG) -u unix.vim $(NO_INITS) -s dotest.in
+RUN_VIM = VIMRUNTIME=$(SCRIPTSOURCE) $(VALGRIND) $(VIMPROG) -f $(GUI_FLAG) -u unix.vim $(NO_INITS) -s dotest.in
 
 clean:
 	-rm -rf *.out *.failed *.res *.rej *.orig XfakeHOME Xdir1 Xfind
@@ -150,7 +150,7 @@
 # New style of tests uses Vim script with assert calls.  These are easier
 # to write and a lot easier to read and debug.
 # Limitation: Only works with the +eval feature.
-RUN_VIMTEST = VIMRUNTIME=$(SCRIPTSOURCE); export VIMRUNTIME; $(VALGRIND) $(VIMPROG) -f $(GUI_FLAG) -u unix.vim
+RUN_VIMTEST = VIMRUNTIME=$(SCRIPTSOURCE) $(VALGRIND) $(VIMPROG) -f $(GUI_FLAG) -u unix.vim
 
 newtests: newtestssilent
 	@/bin/sh -c "if test -f messages && grep -q 'SKIPPED\|FAILED' messages; then cat messages; fi"
diff --git a/src/testdir/shared.vim b/src/testdir/shared.vim
index e1bb818..9e4b1bb 100644
--- a/src/testdir/shared.vim
+++ b/src/testdir/shared.vim
@@ -261,7 +261,7 @@
     let cmd = cmd . ' -u ' . name
   endif
   let cmd .= ' --not-a-term'
-  let cmd = substitute(cmd, 'VIMRUNTIME=.*VIMRUNTIME;', '', '')
+  let cmd = substitute(cmd, 'VIMRUNTIME=\S\+', '', '')
 
   " If using valgrind, make sure every run uses a different log file.
   if cmd =~ 'valgrind.*--log-file='
diff --git a/src/version.c b/src/version.c
index 75fa9c5..cca8b5b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1694,
+/**/
     1693,
 /**/
     1692,