[PATCH] graph API: fix extra space during pre_commit_line state

[Allan Caffee <allan.caffee@gmail.com>]

An extra space is being inserted between the "commit" column and all of
the successive edges.  Remove this space.  This regression was
introduced by 427fc5b.

Signed-off-by: Allan Caffee <allan.caffee@gmail.com>
---
 graph.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

On Tue, 21 Apr 2009, Teemu Likonen wrote:
> The colored log graph implementation (commit 427fc5b) introduces an
> alignment bug which looks like this:
> 
> | | * | edf2e37 git-apply: work from subdirectory.
> | | * | 4ca0660 working from subdirectory: preparation
> | |  | |        
> | |   \ \       
> | |    \ \      
> | |     \ \     
> | |      \ \    
> | |       \ \   
> | *-----. \ \   5401f30 Merge branches 'jc/apply', 'lt/ls-tree', [...]
> | |\ \ \ \ \ \  
> | | | | | * | | 0501c24 Tutorial: adjust merge example to recursive [...]
> 
> 
> In other words, the diagonal lines after this octopus merge are aligned
> wrong. To see it yourself type
> 
>     git log --graph --oneline a957207
> 
> in the Git repository and scroll the output down a bit. Note that the
> bug exists with both --color _and_ --no-color.

It's actually the lines before the merge that are shifted to the right
by one.  This patch should fix that.

This issue exposes a gap in the existing test coverage, which doesn't
exercise the pre_commit_line code.  Maybe another patch is in order to
extend t4202-log to cover pre-commit lines and octopus merges.

diff --git a/graph.c b/graph.c
index d4571cf..31e09eb 100644
--- a/graph.c
+++ b/graph.c
@@ -727,8 +727,8 @@ static void graph_output_pre_commit_line(struct git_graph *graph,
 		if (col->commit == graph->commit) {
 			seen_this = 1;
 			strbuf_write_column(sb, col, '|');
-			strbuf_addf(sb, " %*s", graph->expansion_row, "");
-			chars_written += 2 + graph->expansion_row;
+			strbuf_addf(sb, "%*s", graph->expansion_row, "");
+			chars_written += 1 + graph->expansion_row;
 		} else if (seen_this && (graph->expansion_row == 0)) {
 			/*
 			 * This is the first line of the pre-commit output.
-- 
1.5.6.3