Don't use unicode when it isn't availible

prompt_fred_setup

@@ -1,5 +1,18 @@
 # My mess of various themes
 
+if [[ $(locale charmap) != UTF-8 || "$TERM" == linux ]]
+then
+  ERROR_CHAR=''
+  GIT_DIRTY_CHAR='+-'
+  PREFIX='$'
+  LCOLOR=""
+else
+  ERROR_CHAR='⏎'
+  GIT_DIRTY_CHAR="±"
+  PREFIX="❱" # U+2771
+  LCOLOR="$fg_bold[black]"
+fi
+
 prompt_context() {
   if [ -n "$SSH_CLIENT" ]
   then
@@ -14,7 +27,7 @@ rprompt_git() {
   ref=${vcs_info_msg_0_}
   if [[ -n ${ref} ]]; then
     if test -n "$(git status --porcelain --ignore-submodules)"; then
-        print '%F{yellow}\u00b1%f'
+        print '%F{yellow}'$GIT_DIRTY_CHAR'%f'
     fi
   fi
 }
@@ -37,14 +50,6 @@ prompt_git() {
 }
 
 prompt_prefix() {
-  if [[ $(locale charmap) != UTF-8 || "$TERM" == linux ]]
-  then
-    PREFIX='$'
-    LCOLOR=""
-  else
-    PREFIX="❱" # U+2771
-    LCOLOR="$fg_bold[black]"
-  fi
   print "%(!. %B%F{red}#%f%b.)%B%F{cyan}${PREFIX}%f%b "
 }
 
@@ -84,7 +89,7 @@ function prompt_fred_setup {
 
   # Define prompts.
   PROMPT='$(prompt_context)%F{cyan} %${PWDWIDTH}<..<%~%f$(prompt_git)$(prompt_prefix)'
-  RPROMPT='${editor_info[overwrite]}%(?:: %F{red}%?⏎%f) $(rprompt_git)'
+  RPROMPT='${editor_info[overwrite]}%(?:: %F{red}%?'$ERROR_CHAR'%f) $(rprompt_git)'
   SPROMPT='zsh: correct %F{red}%R%f to %F{green}%r%f [nyae]? '
 }