chore(lib): remove use of eval

lib/layout-helpers.sh

@@ -363,7 +363,9 @@ finalize_and_go_to_session() {
 #   /Users/jimeh/Projects
 #
 __expand_path() {
-  echo $(eval echo "$@")
+  local path="$1"
+  path="${path/#\~/$HOME}"
+  echo "$path"
 }
 
 __get_first_window_index() {

test/lib/layout-helpers/__expand_path.test.sh

@@ -19,6 +19,12 @@ assert '__expand_path "/path/to/file"' "/path/to/file"
 # When given a path containing spaces, it returns path correctly.
 assert '__expand_path "~/Path To/File"' "${HOME}/Path To/File"
 
+# When given a relative path, it returns path as is.
+assert '__expand_path "foo/bar"' "foo/bar"
+
+# When given a relative parent path, it returns path as is.
+assert '__expand_path "../foo/bar"' "../foo/bar"
+
 # Tear down.
 HOME="$realHOME"
 unset realHOME