bug fix: correctly handle consecutive segments without background

powerlevel9k.zsh-theme

@@ -208,7 +208,7 @@ left_prompt_segment() {
     output+="\${_P9K_N::=}\${_P9K_F::=}"
     output+="\${\${\${\${_P9K_BG:-0}:#NONE}:-\${_P9K_N::=$((t+1))}}+}"                        # 1
     output+="\${\${_P9K_N:=\${\${\$((_P9K_I>=$_P9K_LEFT_JOIN[$2])):#0}:+$((t+2))}}+}"         # 2
-    output+="\${\${_P9K_N:=\${\${\$((!\${#\${_P9K_BG:-0}:#$bg_color})):#0}:+$((t+3))}}+}"  # 3
+    output+="\${\${_P9K_N:=\${\${\$((!\${#\${:-0\$_P9K_BG}:#0$bg_color})):#0}:+$((t+3))}}+}"  # 3
     output+="\${\${_P9K_N:=\${\${_P9K_F::=%F{\$_P9K_BG\}}+$((t+4))}}+}"                       # 4
     output+="\$_P9K_F\${_P9K_T[\$_P9K_N]}$icon_sep\${_P9K_C}$space\${\${_P9K_I::=$2}+}\${\${_P9K_BG::=$bg_color}+}}"
 
@@ -271,7 +271,7 @@ right_prompt_segment() {
     output+="\${_P9K_N::=}"
     output+="\${\${\${\${_P9K_BG:-0}:#NONE}:-\${_P9K_N::=$((t+1))}}+}"                        # 1
     output+="\${\${_P9K_N:=\${\${\$((_P9K_I>=$_P9K_RIGHT_JOIN[$2])):#0}:+$((t+2))}}+}"        # 2
-    output+="\${\${_P9K_N:=\${\${\$((!\${#\${_P9K_BG:-0}:#$bg_color})):#0}:+$((t+3))}}+}"  # 3
+    output+="\${\${_P9K_N:=\${\${\$((!\${#\${:-0\$_P9K_BG}:#0$bg_color})):#0}:+$((t+3))}}+}"  # 3
     output+="\${\${_P9K_N:=$((t+1))}+}"                                                       # 4 == 1
     output+="\${_P9K_T[\$_P9K_N]}\${_P9K_C}\${_P9K_C:+ }$icon\${\${_P9K_I::=$2}+}\${\${_P9K_BG::=$bg_color}+}}"