vimrc: use matchall() instead of ":match" to allow multiple matches

[blueyed]

BPO	9084
Nosy	@brettcannon, @blueyed, @merwok
Dependencies	bpo-9893: Removing the Misc/Vim/ files
Files	python-vimrc-use-matchadd.diff

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/brettcannon'
closed_at = <Date 2012-11-15.21:21:20.630>
created_at = <Date 2010-06-26.02:43:11.465>
labels = ['type-bug']
title = 'vimrc: use matchall() instead of ":match" to allow multiple matches'
updated_at = <Date 2012-11-15.21:21:20.629>
user = 'https://github.com/blueyed'

bugs.python.org fields:

activity = <Date 2012-11-15.21:21:20.629>
actor = 'brett.cannon'
assignee = 'brett.cannon'
closed = True
closed_date = <Date 2012-11-15.21:21:20.630>
closer = 'brett.cannon'
components = ['Demos and Tools']
creation = <Date 2010-06-26.02:43:11.465>
creator = 'blueyed'
dependencies = ['9893']
files = ['17773']
hgrepos = []
issue_num = 9084
keywords = ['patch']
message_count = 2.0
messages = ['108683', '175646']
nosy_count = 3.0
nosy_names = ['brett.cannon', 'blueyed', 'eric.araujo']
pr_nums = []
priority = 'low'
resolution = 'wont fix'
stage = 'patch review'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue9084'
versions = []

[blueyed]

This patch fixes the vimrc example file to use matchadd() instead of ":match", so that the second "match" does not overwrite the first one.

This resulted in leading tabs not highlighted as BadWhitespace.

[brettcannon]

7e37a6c76e36 removes the files in Misc/Vim. Thanks for the patch regardless, Daniel. If the syntax file in Vim is out of date then I would suggest trying to submit a patch. I have found the Vim maintainer quite willing to take fixes.