api: Rename dict_set_value to dict_set_var

Reasonings:
1. It is not used for anything, but scope dictionaries currenly. So there is no 
   need to generalize and split it into dict_set_var (which will contain some 
   scope-dictionary-specific checks) and dict_set_value (which will work for any 
   dictionary).
2. Check for key size is no longer valid for non-scope dictionaries: you *can* 
   use empty keys there. In scope dictionaries also, but you actually are not 
   supposed to store there anything, but variables.

Note that actually one may still do

    let b:[''] = 1

and “bypass” check for variable name. It won’t change what `echo b:` will show, 
but it may affect code which iterates over scope dictionary keys and sets them 
to something (if there is such code).

1 files changed, 4 insertions, 4 deletions

diff --git a/src/nvim/api/window.c b/src/nvim/api/window.c
index 1f555a6a05..13294e6bf2 100644
--- a/src/nvim/api/window.c
+++ b/src/nvim/api/window.c
@@ -210,7 +210,7 @@ void nvim_win_set_var(Window window, String name, Object value, Error *err)
     return;
   }
 
-  dict_set_value(win->w_vars, name, value, false, false, err);
+  dict_set_var(win->w_vars, name, value, false, false, err);
 }
 
 /// Removes a window-scoped (w:) variable
@@ -226,7 +226,7 @@ void nvim_win_del_var(Window window, String name, Error *err)
     return;
   }
 
-  dict_set_value(win->w_vars, name, NIL, true, false, err);
+  dict_set_var(win->w_vars, name, NIL, true, false, err);
 }
 
 /// Sets a window-scoped (w:) variable
@@ -249,7 +249,7 @@ Object window_set_var(Window window, String name, Object value, Error *err)
     return (Object) OBJECT_INIT;
   }
 
-  return dict_set_value(win->w_vars, name, value, false, true, err);
+  return dict_set_var(win->w_vars, name, value, false, true, err);
 }
 
 /// Removes a window-scoped (w:) variable
@@ -268,7 +268,7 @@ Object window_del_var(Window window, String name, Error *err)
     return (Object) OBJECT_INIT;
   }
 
-  return dict_set_value(win->w_vars, name, NIL, true, true, err);
+  return dict_set_var(win->w_vars, name, NIL, true, true, err);
 }
 
 /// Gets a window option value