Fix escape_string

Author: mattn

autoload/vimlparser.vim

@@ -4876,17 +4876,17 @@ endfunction
 
 function! s:Compiler.escape_string(str)
   let m = {"\n": '\n', "\t": '\t', "\r": '\r'}
-  let str = '"'
+  let out = '"'
   for i in range(len(a:str))
     let c = a:str[i]
     if has_key(m, c)
-      let str .= m[c]
+      let out .= m[c]
     else
-      let str .= c
+      let out .= c
     endif
   endfor
-  let str .= '"'
-  return str
+  let out .= '"'
+  return out
 endfunction
 
 function! s:Compiler.compile_lambda(node)

js/vimlparser.js

@@ -4860,20 +4860,20 @@ Compiler.prototype.compile_curlynameexpr = function(node) {
 
 Compiler.prototype.escape_string = function(str) {
     var m = {"\n":"\\n", "\t":"\\t", "\r":"\\r"};
-    var str = "\"";
+    var out = "\"";
     var __c13 = viml_range(viml_len(str));
     for (var __i13 = 0; __i13 < __c13.length; ++__i13) {
         var i = __c13[__i13];
         var c = str[i];
         if (viml_has_key(m, c)) {
-            str += m[c];
+            out += m[c];
         }
         else {
-            str += c;
+            out += c;
         }
     }
-    str += "\"";
-    return str;
+    out += "\"";
+    return out;
 }
 
 Compiler.prototype.compile_lambda = function(node) {

py/vimlparser.py

@@ -3809,15 +3809,15 @@ def compile_curlynameexpr(self, node):
 
     def escape_string(self, str):
         m = AttributeDict({"\n":"\\n", "\t":"\\t", "\r":"\\r"})
-        str = "\""
+        out = "\""
         for i in viml_range(viml_len(str)):
             c = str[i]
             if viml_has_key(m, c):
-                str += m[c]
+                out += m[c]
             else:
-                str += c
-        str += "\""
-        return str
+                out += c
+        out += "\""
+        return out
 
     def compile_lambda(self, node):
         rlist = [self.compile(vval) for vval in node.rlist]