fix (zshrc): WORDCHARS are a feature from zsh and should not require an export

zshrc

@@ -14,7 +14,7 @@ bindkey '^P' history-beginning-search-backward
 bindkey '^N' history-beginning-search-forward
 
 # List of non-alphanumeric characters considered part of a word
-export WORDCHARS='*?_-.[]~=&;!#$%^(){}<>'
+WORDCHARS='*?_-.[]~=&;!#$%^(){}<>'
 
 # Do not create a history file for less
 export LESSHISTFILE=/dev/null
@@ -68,7 +68,7 @@ setopt HIST_IGNORE_SPACE
 # When writing out the history file, older commands that duplicate newer ones are omitted
 setopt HIST_SAVE_NO_DUPS
 
-# Enable vcs_info
+# parameter expansion, command substitution and arithmetic expansion are performed in prompts
 setopt PROMPT_SUBST
 
 # Comfortable aliases
@@ -91,7 +91,7 @@ alias less='less --line-numbers'
 alias cdt='builtin cd "$(mktemp -d)"'
 
 # Defines the prompt
-precmd() {
+precmd_define_prompt() {
   vcs_info
 
   # check if vcs_info_msg_0_ is empty to avoid an anoying space in the prompt
@@ -101,6 +101,8 @@ precmd() {
     PS1='%B%K{white}%F{black}%(3~|…/%1~|%~)%k%f %F{green}${vcs_info_msg_0_}%f %%%b '
   fi
 }
+typeset -ga precmd_functions
+precmd_functions+=precmd_define_prompt
 
 # include reading files from directory
 source "${HOME}"/.zsh/*