Merge branch 'use-iso-date-format' into 'master'

Use ISO date format in history

See merge request !15

zshrc

@@ -31,7 +31,7 @@ typeset -U path
 # "mm/dd/yyyy"|"dd.mm.yyyy"|"yyyy-mm-dd"
 # or set a custom format using the strftime function format specifications,
 # see 'man strftime' for details.
-HIST_STAMPS='%Y/%m/%d'
+HIST_STAMPS='%Y-%m-%d'
 # Don't store invocations of 'history' in the history
 setopt HIST_NO_STORE
 # Enable incremental append