Merge pull request #834 from dennisjbell/master

Fix `Class MMBackend` duplication bug on launch

src/MacVim/mvim

@@ -11,21 +11,17 @@
 # Bjorn Winckler (Aug 13 2007).
 
 # Find Vim executable
-if [ -L "$0" ]; then
-	# readlink -f
-	curdir=`pwd -P`
-	self_path=$0
-	cd "`dirname $self_path`"
-	while [ -L "$self_path" ]; do
-		self_path=`readlink $self_path`
-		cd "`dirname $self_path`"
-		self_path=`basename $self_path`
-	done
-	binary="`pwd -P`/../MacOS/Vim"
-	cd "$curdir"
-else
-	binary="`dirname "$0"`/../MacOS/Vim"
-fi
+orig_path="$(pwd -P)"
+self_path="$0"
+while [ -L "$self_path" ]; do  # dereference links
+	link="$(basename "$self_path")"
+	cd "$(dirname "$self_path")"
+	self_path="$(readlink "$link")"
+done
+cd "$(dirname "$self_path")"
+binary="$(dirname "$(pwd -P)")/MacOS/Vim"
+cd "$orig_path"
+
 if ! [ -x "$binary" ]; then
 	echo "Sorry, cannot find Vim executable."
 	exit 1