Fix Python's IndentationError issue in most cases

Insert a `#` character at the beginning of blank lines above indention
line, to meet the REPL’s limitation.

Now the below Python code will work in Codi:

```
class Test(object):

  def __init__(self):
    pass

  def an_empty_line_above_this(self):

    return ‘No worry about the blank lines’

if __name__ == ‘__main__’:

  print(‘blank lines are cool, now PEP8 lint stop warning about it\’s
absence.’)
```

autoload/codi/load.vim

@@ -88,9 +88,9 @@ endfunction
 " Python rephrasers
 function! s:rp_py(buf)
   let b = a:buf
-  " Insert # in the blank lines above Python's class methods definition to avoid
+  " Insert # in the blank lines above Python's indention line to avoid
   " `IndentationError`.
-  let b = substitute(b, '\(\s*\n\)\+\(\n\s\+def\)\@=', '\=substitute(submatch(0), "\s*\n", "\r#", "g")', 'g')
+  let b = substitute(b, '\(\s*\n\)\+\(\n\s\+\w\+\)\@=', '\=substitute(submatch(0), "\s*\n", "\r#", "g")', 'g')
   return b
 endfunction
 

doc/codi.txt

@@ -394,8 +394,6 @@ notes:
 python~
 bin: python
 maintainer: @metakirby5
-notes:
-  - Cannot leave empty lines in defs
 
 ruby~
 maintainer: @metakirby5
@@ -406,15 +404,7 @@ program; it supports nothing more than what the underlying bin supports.
 This is why Haskell language pragmas don't work, PureScript only works
 inside a project folder, and OCaml statements must end with ;;. Also, in
 most whitespace-sensitive languages, an empty line represents the end of a
-definition, so the below Python class will not work in Codi:
->
-             class Test(object):
-                 def __init__(self):
-                     pass
-
-                 def oops_theres_an_empty_line_above_this(self):
-                     return 1
-<
+definition. 
 
 OUTPUT SPECIFICATION                           *codi-interpreters-output-spec*