Merge pull request #602 from blueyed/improve-jedi-load-error

Improve error msg when the jedi submodule fails to load

jedi_vim.py

@@ -89,8 +89,8 @@ def no_jedi_warning(error=None):
 
 
 def echo_highlight(msg):
-    vim_command('echohl WarningMsg | echom "{0}" | echohl None'.format(
-        msg.replace('"', '\\"')))
+    vim_command('echohl WarningMsg | echom "jedi-vim: {0}" | echohl None'.format(
+        str(msg).replace('"', '\\"')))
 
 
 try:
@@ -102,7 +102,10 @@ else:
     try:
         version = jedi.__version__
     except Exception as e:  # e.g. AttributeError
-        echo_highlight("Could not load jedi python module: {0}".format(e))
+        echo_highlight(
+            "Error when loading the jedi python module ({0}). "
+            "Please ensure that Jedi is installed correctly (see Installation "
+            "in the README.".format(e))
         jedi = None
     else:
         if isinstance(version, str):