Merge branch 'js/git-bash-if-available'

git-gui will now use git-bash instead of bash on Windows, if it is
available.

* js/git-bash-if-available:
  git-gui (Windows): use git-bash.exe if it is available

Author: prati0100

git-gui.sh

@@ -2736,10 +2736,18 @@ if {![is_bare]} {
 }
 
 if {[is_Windows]} {
+	# Use /git-bash.exe if available
+	set normalized [file normalize $::argv0]
+	regsub "/mingw../libexec/git-core/git-gui$" \
+		$normalized "/git-bash.exe" cmdLine
+	if {$cmdLine != $normalized && [file exists $cmdLine]} {
+		set cmdLine [list "Git Bash" $cmdLine &]
+	} else {
+		set cmdLine [list "Git Bash" bash --login -l &]
+	}
 	.mbar.repository add command \
 		-label [mc "Git Bash"] \
-		-command {eval exec [auto_execok start] \
-					  [list "Git Bash" bash --login -l &]}
+		-command {eval exec [auto_execok start] $cmdLine}
 }
 
 if {[is_Windows] || ![is_bare]} {