revert the unicode changes. Slightly modify the code so the special characters are shown as numeric unicode

themes/agnoster.zsh-theme

@@ -26,7 +26,7 @@
 # A few utility functions to make it easy and re-usable to draw segmented prompts
 
 CURRENT_BG='NONE'
-SEGMENT_SEPARATOR='⮀'
+SEGMENT_SEPARATOR='\ue0b0'
 
 
 # Begin a segment
@@ -76,7 +76,7 @@ prompt_git() {
     ref=$(git symbolic-ref HEAD 2> /dev/null) || ref="➦ $(git show-ref --head -s --abbrev |head -n1 2> /dev/null)"
     if [[ -n $dirty ]]; then
       prompt_segment red black 
-      st=' ±'
+      st=' \u00b1'
     else
       prompt_segment green black
 
@@ -101,7 +101,7 @@ prompt_git() {
     zstyle ':vcs_info:*' formats ' %u%c'
     zstyle ':vcs_info:*' actionformats ' %u%c'
     vcs_info
-    echo -n "${ref/refs\/heads\//⭠ }${vcs_info_msg_0_%% }${mode}"
+    echo -n "${ref/refs\/heads\//\ue0a0 }${vcs_info_msg_0_%% }${mode}"
   fi
 }