patch 8.0.0360: sometimes VimL is used instead of "Vim script"

Problem:    Sometimes VimL is used, which is confusing.
Solution:   Consistently use "Vim script". (Hirohito Higashi)
diff --git a/runtime/doc/usr_02.txt b/runtime/doc/usr_02.txt
index 48dede8..3c68943 100644
--- a/runtime/doc/usr_02.txt
+++ b/runtime/doc/usr_02.txt
@@ -589,7 +589,7 @@
     register: >
    	:help quote:
 
-13) Vim Script (VimL) is available at >
+13) Vim script is available at >
 	:help eval.txt
 <   Certain aspects of the language are available at :h expr-X where "X" is a
    single letter. E.g.  >
@@ -599,10 +599,10 @@
    Also important is >
    	:help function-list
 <   to find a short description of all functions available.  Help topics for
-   VimL functions always include the "()", so: >
+   Vim script functions always include the "()", so: >
    	:help append()
-<   talks about the append VimL function rather than how to append text in the
-   current buffer.
+<   talks about the append Vim script function rather than how to append text
+   in the current buffer.
 
 14) Mappings are talked about in the help page :h |map.txt|. Use >
     	:help mapmode-i