Merge branch 'zj/diff-stat-smaller-num-columns'

Spend only minimum number of columns necessary to show the number of lines
in the output from "diff --stat", instead of always allocating 4 columns
even when showing changes that are much smaller than 1000 lines.

By Zbigniew Jędrzejewski-Szmek
* zj/diff-stat-smaller-num-columns:
  diff --stat: use less columns for change counts

Documentation/gitcore-tutorial.txt

@@ -1002,8 +1002,8 @@ would be different)
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 Updating from ae3a2da... to a80b4aa....
 Fast-forward (no commit created; -m option ignored)
- example |    1 +
- hello   |    1 +
+ example | 1 +
+ hello   | 1 +
  2 files changed, 2 insertions(+)
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