[PATCH v3] mergetools/meld: improve compatibiilty with Meld on macOS X

[David Aguilar <davvid@gmail.com>]

The macOS X fork of Meld[1] requires a "=" in the "--output"
argument, as it uses a wrapper[2] script that munges the
"--output" argument before calling into the common "meld"
script.

The macOS X wrapper script[2] accepts "--output=<filename>"
only, despite the fact that the underlying meld code accepts
both "--output <filename" and "--output=<filename>"[3].

All versions of meld which accept "--output" accept it in
the "--output=<filename>" form, so use "--output=<file>" for
maximum compatibility.

[1] https://github.com/yousseb/meld
[2] https://github.com/yousseb/meld/blob/master/osx/Meld
[3] https://github.com/yousseb/meld/issues/42

Reported-by: Matthew Groth <mgroth49@gmail.com>
Helped-by: Samuel Lijin <sxlijin@gmail.com>
Signed-off-by: David Aguilar <davvid@gmail.com>
---
I cloned the meld repo and could not find the code reported in the original
issue, but I did find that same exact code existed in a macOS fork.

After more investigation, this turned out to be a macOS-only issue.  The
commit message has been updated to better reflect what's really going on.

 mergetools/meld | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mergetools/meld b/mergetools/meld
index bc178e8882..7a08470f88 100644
--- a/mergetools/meld
+++ b/mergetools/meld
@@ -10,7 +10,7 @@ merge_cmd () {
 
 	if test "$meld_has_output_option" = true
 	then
-		"$merge_tool_path" --output "$MERGED" \
+		"$merge_tool_path" --output="$MERGED" \
 			"$LOCAL" "$BASE" "$REMOTE"
 	else
 		"$merge_tool_path" "$LOCAL" "$MERGED" "$REMOTE"
-- 
2.13.1.453.gc0395165f3