add prefixes

glossary.tex

@@ -58,12 +58,14 @@
 
 \newacronym[
   description={The ``battery power'' of a magic user, which allows them to power spells},
-  shortplural={MP}
+  shortplural={MP},
+  prefix={a\space},
   ]{mp}{MP}{Mana Point}
 
 \newacronym[
   description={A measure of actions someone can take in a round, based on how fast they can move and react},
-  shortplural={AP}
+  shortplural={AP},
+  prefix={an\space},
   ]{ap}{AP}{Action Point}
 
 \newacronym[
@@ -72,7 +74,8 @@
   ]{xp}{XP}{Experience Point}
 
 \newacronym[
-  description={-- one of the characters run by the people playing the game}
+  description={-- one of the characters run by the people playing the game},
+  prefix={an\space},
   ]{pc}{PC}{Player Character}
 
 \newacronym[