Exit status 130 when fzf is terminated by the user

Related: #345

plugin/fzf.vim

@@ -228,10 +228,11 @@ function! s:execute(dict, command, temps)
   execute 'silent !'.command
   redraw!
   if v:shell_error
-    " Do not print error message on exit status 1
-    if v:shell_error > 2
+    " Do not print error message on exit status 1 (no match) or 130 (interrupt)
+    if v:shell_error == 2
       echohl ErrorMsg
       echo 'Error running ' . command
+      echohl None
     endif
     return []
   else

src/constants.go

@@ -52,4 +52,5 @@ const (
 	exitOk        = 0
 	exitNoMatch   = 1
 	exitError     = 2
+	exitInterrupt = 130
 )

src/terminal.go

@@ -791,7 +791,7 @@ func (t *Terminal) Loop() {
 						exit(exitNoMatch)
 					case reqQuit:
 						C.Close()
-						exit(exitError)
+						exit(exitInterrupt)
 					}
 				}
 				t.placeCursor()