fix variable syntax

cmd.mk

@@ -20,9 +20,6 @@ $(lists): lists/%.md: command.rec | lists/
 	@printf '%s\n' '---' >> $@
 	@$(call list_commands,$(basename $(notdir $@))) >> $@
 
-.PHONY: cmd
-cmd: $(lists) ## Big lists of commands
-
 .PHONY: function
 function: ## Output a search function for .bashrc
 	${MAKE} --silent --touch query

data/recfiles/extended.md

@@ -16,23 +16,23 @@ Make a database for your boardgames, specifying only one field and value:
 database=games.rec
 n=Name
 g=Vojvodina
-touch $database
-recins -f $n --value $g $database
-recsel $database
+touch ${database}
+recins -f ${n} --value ${g} ${database}
+recsel ${database}
 ```
 
 Insert a few more, with the estimated playtime:
 
 ```sh
-recins -f Name -v Saboter -f Playtime -v 30 $database
-recins -f Name -v Chess -f Playtime -v 30 $database
+recins -f Name -v Saboter -f Playtime -v 30 ${database}
+recins -f Name -v Chess -f Playtime -v 30 ${database}
 ```
 
 View all games, or select one by number:
 
 ```sh
-recsel $database
-recsel -n 0 $database
+recsel ${database}
+recsel -n 0 ${database}
 ```
 
 Each game should note whether or not you have played it yet, so you can add that field and set the default to `yes`.
@@ -40,14 +40,14 @@ Each game should note whether or not you have played it yet, so you can add that
 ```sh
 f=played
 v=yes
-recset -f $f -a $v $database
+recset -f ${f} -a ${v} ${database}
 ```
 
 ...but the field is wrong, it should have a capital letter:
 
 ```sh
 new_field=Played
-recset -f $f --rename $new_field
+recset -f ${f} --rename ${new_field}
 ```
 
 ## Read
@@ -55,20 +55,20 @@ recset -f $f --rename $new_field
 Check how many records the database has:
 
 ```sh
-recinf $database
+recinf ${database}
 ```
 
 Look at just the games you've never played:
 
 ```sh
-recsel --expression="Played = 'no'" $database
+recsel --expression="Played = 'no'" ${database}
 ```
 
 Print how many, then just print the names:
 
 ```sh
-recsel -e "Played = 'no'" --count $database
-recsel -e "Played = 'no'" --print=Name $database
+recsel -e "Played = 'no'" --count ${database}
+recsel -e "Played = 'no'" --print=Name ${database}
 ```
 
 ## Update
@@ -79,8 +79,8 @@ To change a game's `Played` field from `no` to `yes`, use `recset` to specify th
 num=0
 f=Played
 value=yes
-recsel --number=$num $database
-recset --number=$num -f $f --set=$value $database
+recsel --number=${num} ${database}
+recset --number=${num} -f ${f} --set=${value} ${database}
 ```
 
 Find all games with a playtime of `30`, and set the field `Max_Players` to `4`.
@@ -102,22 +102,22 @@ Remove `Played` record from first game:
 
 ```sh
 num=0
-recset --number=$num -f Played --delete $database
+recset --number=${num} -f Played --delete ${database}
 ```
 
 You can comment the line instead of deleting it:
 
 ```sh
 num=1
-recset --number=$num -f Played --delete $database
-recsel $database
-cat $database
+recset --number=${num} -f Played --delete ${database}
+recsel ${database}
+cat ${database}
 ```
 
 Delete an entire record:
 
 ```sh
 num=2
-recdel --number=$num $database
+recdel --number=${num} ${database}
 ```