Fixed the broken env variables help message.

Fixes: #79

ChangeLog

@@ -1,6 +1,14 @@
-2.8.0 (2019-01-26)
+2.8.1 (TBA)
 -----------
 
+Bugfixes:
+
+* The environment variables help message has been fixed (#79).
+
+
+2.8.0 (2019-01-26)
+------------------
+
 New features:
 
 * Allow argbash and argbash-init to be run from symbolic links.

src/stuff.m4

@@ -302,13 +302,29 @@ m4_define([_MAKE_HELP_FUNCTION_OPTIONAL_PART], [m4_lists_foreach_optional(
 )])])
 
 
+dnl
+dnl $1: list name
+dnl $2: name
+dnl $3: default
+dnl $4: help
+m4_define([_MAKE_ENV_HELP_MESSAGE], [m4_do(
+	[m4_ifnblank([$4], [m4_list_append([$1], m4_do(
+		[[$2: $4.]],
+		[m4_ifnblank([$3], [[ (default: '$3']]))],
+	))])],
+)])
+
+
+dnl
+dnl $1: The name of list for help messages
+m4_define([_MAKE_ENV_HELP_MESSAGES], [m4_do(
+	[m4_lists_foreach([ENV_NAMES,ENV_DEFAULTS,ENV_HELPS], [_name,_default,_help], 
+		[_MAKE_ENV_HELP_MESSAGE([$1], _name, _default, _help)])],
+)])
+
+
 m4_define([_MAKE_HELP_FUNCTION_ENVVARS_PART], [m4_do(
-	[m4_lists_foreach([ENV_NAMES,ENV_DEFAULTS,ENV_HELPS], [_name,_default,_help], [m4_do(
-		[m4_ifnblank(_help, [m4_list_append([LIST_ENV_HELP], m4_expand([m4_do(
-			[m4_expand([_name: _help.])],
-			[m4_ifnblank(_default, [ (default: ']_default'))],
-		)]))])],
-	)])],
+	[_MAKE_ENV_HELP_MESSAGES([LIST_ENV_HELP])],
 	[printf '\nEnvironment variables that are supported:\n'
 ],
 	[m4_list_foreach([LIST_ENV_HELP], [_msg], [printf '\t%s\n' "[]_msg"

start_tmux.sh

@@ -2,8 +2,8 @@ tmux new-session -d -s argbash
 tmux send-keys 'cd src' C-m
 tmux send-keys 'vim stuff.m4' C-m
 tmux new-window -c resources
-tmux send-keys -l 'make check'
-tmux new-window -c tests/regressiontests
+tmux send-keys -l 'make unittests'
+tmux new-window -c tests/unittests
 tmux send-keys -l 'vim '
 tmux select-window -t argbash:0
 tmux -2 attach-session -t argbash