Fix prompt precmd spacing.

Only add spaces if there is content.

pure.zsh

@@ -20,6 +20,7 @@
 # turns seconds into human readable time
 # 165392 => 1d 21h 56m 32s
 prompt_pure_human_time() {
+	echo -n " "
 	local tmp=$1
 	local days=$(( tmp / 60 / 60 / 24 ))
 	local hours=$(( tmp / 60 / 60 % 24 ))
@@ -61,7 +62,8 @@ prompt_pure_preexec() {
 
 # string length ignoring ansi escapes
 prompt_pure_string_length() {
-	echo ${#${(S%%)1//(\%([KF1]|)\{*\}|\%[Bbkf])}}
+	# Subtract one since newline is counted as two characters
+	echo $(( ${#${(S%%)1//(\%([KF1]|)\{*\}|\%[Bbkf])}} - 1 ))
 }
 
 prompt_pure_precmd() {