Bugfix: do not count tmux source-file as tmux process

Do not count `tmux source-file .tmux.conf` as a tmux process when checking if
other tmux server is running.

Previously, this caused interpolation command not to be inserted into
`status-right` because `tmux source-file` was falsely detected as another tmux
server.

CHANGELOG.md

@@ -3,6 +3,10 @@
 ### master
 - properly quote scripts
 - bugfix: "auto restore" feature does not work on tmux `1.9a`
+- bugfix: do not count `tmux source-file .tmux.conf` as a tmux process (when
+  checking if other tmux server is running). Previously, this caused
+  interpolation command not to be inserted into `status-right` because `tmux
+  source-file` was falsely detected as another tmux server.
 
 ### v3.0.0, 2015-02-20
 - rename the plugin from `tmux-resurrect-auto` to `tmux-continuum`

scripts/helpers.sh

@@ -23,8 +23,10 @@ current_tmux_server_pid() {
 }
 
 all_tmux_processes() {
+	# ignores `tmux source-file .tmux.conf` command used to reload tmux.conf
 	ps -Ao "command pid" |
-		\grep "^tmux"
+		\grep "^tmux" |
+		\grep -v "^tmux source"
 }
 
 number_tmux_processes_except_current_server() {