[Rev 03] RFR: Fix parsing of editor commandline in git-pr

[Christoph Langer]

> For git editor configurations that aren't a simple call to an editor but have more parameters, the starting of the editor in git pr does not work.
> At least, I observed this in my windows environment, where I have the following git config entry:
> core.editor="C:\\Program Files\\Notepad++\\notepad++.exe" -multiInst -notabbar -nosession -noPlugin

Previous commits in this pull request have been removed, probably due to a force push. The incremental views will show differences compared to the previous content of the PR.

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Added commits:
 - 40e03b44: Fix parsing of editor commandline in git-pr.

Changes:
  - all: https://git.openjdk.java.net/skara/pull/259/files
  - new: https://git.openjdk.java.net/skara/pull/259/files/67cdd0cc..40e03b44

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/259/webrev.03
 - incr: https://webrevs.openjdk.java.net/skara/259/webrev.02-03

  Stats: 15 lines in 1 file changed: 4 ins; 10 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/259.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/259/head:pull/259

PR: https://git.openjdk.java.net/skara/pull/259