`TMUX_PLUGIN_MANAGER_PATH` always has trailng slash

If the trailing slash character is not there it causes issues when
installing plugins.

Closes #38

CHANGELOG.md

@@ -7,6 +7,7 @@
 - add new `set @plugin 'repo'` plugin defintion syntax (@chilicuil)
 - revert back to using `-g` flag in new plugin definition syntax
 - permit leading whitespace with new plugin definition syntax (thanks @chilicuil)
+- make sure `TMUX_PLUGIN_MANAGER_PATH` always has trailng slash
 
 ### v1.2.2, 2015-02-08
 - set GIT_TERMINAL_PROMPT=0 when doing `git clone`, `pull` or `submodule update`

scripts/shared_functions.sh

@@ -5,7 +5,7 @@ SHARED_TPM_PATH=""
 
 # sets a "global variable" for the current file
 shared_set_tpm_path_constant() {
-	local string_path="$(tmux show-environment -g TMUX_PLUGIN_MANAGER_PATH | cut -f2 -d=)"
+	local string_path="$(tmux show-environment -g TMUX_PLUGIN_MANAGER_PATH | cut -f2 -d=)/"
 	# NOTE: manually expanding tilde or `$HOME` variable. Avoids using `eval` as
 	# described here http://stackoverflow.com/a/5748307/777337
 	SHARED_TPM_PATH="$(echo "$string_path" | sed "s,^\$HOME,$HOME," | sed "s,^~,$HOME,")"