add --ansi, as remarked in https://github.com/junegunn/fzf/issues/1175#issuecomment-350938973

Examples.md

@@ -399,7 +399,7 @@ sort -u | awk '{print "\x1b[34;1mbranch\x1b[m\t" $1}') || return
   target=$(
 (echo "$tags"; echo "$branches") |
     fzf --no-hscroll --no-multi --delimiter="\t" -n 2 \
-        --preview="git log -200 --pretty=format:%s $(echo {+2..} |  sed 's/$/../' )" ) || return
+        --ansi --preview="git log -200 --pretty=format:%s $(echo {+2..} |  sed 's/$/../' )" ) || return
   git checkout $(echo "$target" | awk '{print $2}')
 }
 
@@ -438,7 +438,7 @@ fcoc_preview() {
   local commit
   commit=$( glNoGraph |
     fzf --no-sort --reverse --tiebreak=index --no-multi \
-        --preview $_viewGitLogLine ) &&
+        --ansi --preview $_viewGitLogLine ) &&
   git checkout $(echo "$commit" | sed "s/ .*//")
 }
 
@@ -446,7 +446,7 @@ fcoc_preview() {
 fshow_preview() {
     glNoGraph |
         fzf --no-sort --reverse --tiebreak=index --no-multi \
-            --preview $_viewGitLogLine \
+            --ansi --preview $_viewGitLogLine \
                 --header "enter to view, alt-y to copy hash" \
                 --bind "enter:execute:$_viewGitLogLine   | less -R" \
                 --bind "alt-y:execute:$_gitLogLineToHash | xclip"